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Alien Blood

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"Well, I see your problem: You're bleeding tang!"

On the outside, they may be Human Aliens, completely indistinguishable from us Puny Earthlings. Or they can be shapeshifters. Or Rubber-Forehead Aliens. Whatever...

What is the best way to quickly establish that a character is not human, sometimes to shock other characters around? Dissection? Squick. They may have Bizarre Alien Biology, but that's usually just an informed characteristic which is rarely appealed to, if ever. Unless it's something very obvious, like having two hearts. Solution? Make them bleed. If their blood (assuming it is actually blood and doesn't serve an entirely different purpose in the body) is not red, or nonexistent at all, they might as well have the words "NOT HUMAN" written on their forehead.

The trope, of course, is not limited to Human Aliens (Plant Aliens often have green blood, for no apparent reason), but for other types, it doesn't allow for The Reveal in such an effective way.


With Human Aliens, this is a very mild case of Artistic License – Biology: Since the skin is translucent, a creature with different-colored blood wouldn't have the same skin color as a human...if the skin is white. Darker-skinned aliens, or ones with scales, feathers, hair, or something else hiding their skins avert this problem, albeit probably unintentionally.

Of course, here on Earth, all vertebrates (with the exception of certain lizards and genetic conditions), the largest and most complex members of the animal kingdom, have red blood—the reason? Because all animals breathe oxygen. Red blood cells are red because they contain a protein chemical called hemoglobin, which is bright red in color. This is because hemoglobin contains iron, which is vital for transporting life-sustaining oxygen where it needs to go. There are other pigments like hemocyanin or chlorocurorin that come in such vibrant shades as pink, orange, blue, and green, but these are much less efficient at transporting oxygen than hemoglobin and thus only appear in invertebrates, which have smaller bodies and a better surface-area-to-volume ratio, and thus less need of efficient oxygen transport. Usually hand-waved by having different chemicals in their blood.


In Video Games, Aliens and Monsters often have different colors of blood than red, frequently appearing as optional Adjustable Censorship, to appease the Moral Guardians. Because it's okay to shoot non-human beings if they don't bleed the same way.

Assuming it's not red like human blood, Aliens and Monsters most commonly have blood that's either black or some bright color usually associated with something unhealthy, like orange, green, or yellow (blue and violet are possible, but rare).

Not to be confused with Blue Blood or Black Blood, even if it is, in fact, blue or black. (Though some blue-blooded aliens can, in fact, be Blue Bloods.) Also not to be confused with a book of same name by Joan D. Vinge.

See also Machine Blood, which is for bleeding machines/robots.


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    Anime & Manga 
  • In Black★Rock Shooter, the Otherselves bleed their color theme. For example, Black Rock Shooter bleeds blue and Dead Master bleeds green.
  • In Blue Drop, the Arume have white blood, as do their halfbreed kids.
  • Blue Gender: The Blue initially have red blood, but the new breed that shows up towards the end of the series bleed purple.
  • The Aragami of Blue Seed, being essentially plants, have green blood; this extends to the half-Aragami mutants like Kusanagi, though the latter looks extraordinarily enough not to be mistaken for a normal human. (The color of his blood still helps, considering that he tends to get injured a lot.)
  • Most of the Boomers in Bubblegum Crisis tended to bleed bright orange fluid when damaged, which is unusual for robotic enemies.
  • In Claymore, the shape shifting, human-eating yoma have purple blood. The titular half-yoma warriors have red blood, normally, unless they Awaken, permanently turning into their Superpowered Evil Side. From then on, they'll bleed purple.
  • In a weird aversion and a strange case of Furry Confusion, the blood cells from Cells at Work! are shown having red blood, as well as the various pathogens and bacteria which are often killed by the White Blood Cells with lots of Ludicrous Gibs. (Though probably justified that the blood is really cytoplasm, the inner fluids of a cell, and the red is just artistic license, though it's still bizarre to see anthropomorphic blood cells ''bleeding''.)
  • Jango the demon Panther from episode 7 of Cutey Honey had blue blood.
  • Most of the demon blood in Devil Man Crybaby is mustard yellow or dark green.
  • D.Gray-Man both averts and plays it. The human-based machines akumas have red "blood-oil" (that looks exactly like regular blood) but superpowered but humans Noah have their blood turn black under certain circumstances.
  • Magic-users in Dorohedoro have black particles mixed in with their blood.
  • Dragon Ball:
    • Originally, Great Demon King Piccolo and his reincarnation had red blood until the early Saiyan Saga, but after their Namekian heritage was revealed, all Namekians from there on have purple blood, including Piccolo himself. Dragon Ball Kai later re-colored Piccolo's red blood into purple.
    • Dragon Ball Z has a few other instances as well. Most villains bled purple (e.g. Cell and Buu) or magenta (e.g. Freeza), but occasionally you'd see something weirder. For instance, Zarbon (one of Freeza's henchmen) bled dark blue, which was also reflected in his skin color.
    • There was at least one instance of a retconned blood color: Piccolo's blood was red in an early DBZ episode, censored to light green in the dub. It later became purple and was no longer censored.
    • Freeza's blood color is also retconned. In the series his blood was dark magenta, however in Dragon Ball Z: Resurrection ‘F’ it's purple.
    • Perfect Cell is shown bleeding either green or purple, changing from one episode to the next.
    • Captain Ginyu has dark blue blood.
  • In Genesis Climber MOSPEADA (a.k.a Robotech: The New Generation) the aliens learn to adopt a human appearance; however their blood is green, which leads to The Reveal that Aisha/Marlene is actually an Inbit/Invid.
  • The androids in the Ghost In The Shell series consistently have white blood, a possible reference to the Alien franchise. (See below.)
  • Karas: The Mikura have flourescent green blood.
  • In the Hentai anime La Blue Girl, Shikima demons have blue blood; this is also the case of the heroine, Miko Mido (hence the title), since she is half-Shikima.
  • Non-alien example from Naruto: Tobi bleeds white...stuff. It's discovered that Tobi is in fact Obito and that the crushed half of his body was augmented and held by Spiral Zetsu, who becomes a part of Tobi. That "white stuff" bleeding out of his right half? That's plant matter, for all intents and purposes. He still bleeds normal blood from his left side, however.
  • In Negima! Magister Negi Magi, magical constructs built by the Lifemaker such as the Averruncus series have blood that is white or transparent. Given the way they come into being and what happens when they die, it's likely that they are essentially built out of pure magic and are actually bleeding magical energy.
  • Subverted in Neon Genesis Evangelion, where the robots (well, bio-engineered giant cyborgs encased in Powered Armor) bleed lots and lots of red, but played straight with the blood of the second angel, used as LCL — the orange liquid that fills the cockpits. Also played straight with Unit-02, which bleeds purple High-Pressure Blood.
  • The Mulians in RahXephon are Human Aliens with blue blood.
  • Sailor Moon:
    • Judging from the scenes where Nephrite is bleeding and dying, the Dark Kingdom Generals from the first season of Sailor Moon have green blood, even though they have normal human skin tones and the insides of their mouths are pink (as can clearly be seen on any of the numerous occasions when they Evil Laugh).
    • Zoisite, at least, has been shown to have normal red blood (in episode 34 Mamoru injures him with his rose). Nephrite is apparently somewhat of a case of censorship.
    • Kunzite appears to have hot pink blood (in the episode where a Crescent Beam cuts his hands). Perhaps he's a Klingon?
    • In a rather bizarre reversal of this, the aliens Eiru and An from the first arc of the second season have red blood, even though they have green skin and the insides of their mouths are clearly also green.
  • The impetus for the war between two groups of people in "Seiketsu no Hagurama", with one side having red blood and the other with blue blood. The main character and Gadgeteer Genius is a blue-blooded prince who discovers to his horror that all his steam-punk looking inventions have been used to eradicate the remaining refugee red bloods by orders of his father and king.
  • In Soul Eater. having black blood is a sign that someone has been infected with Asura's blood. The blood is not only different in appearance it has also several battle properties.
  • The Emilys from Str.A.In.: Strategic Armored Infantry bleed green.
  • Partially subverted in Tenchi Muyo! when Tenchi was surprised to find that alien princess Aeka had red blood. Villainous Kagato, on the other hand, bled green.
  • The dragon from the first episode of The Vision of Escaflowne bled blue-green blood.
  • While not aliens or monsters, transformed wielders from Witchblade would bleed clear crystalline blood.

    Asian Animation 
  • In Happy Heroes, Shapeshifter's blood is green, while Kalo's blood is blue.

    Comic Books 
  • DC Comics' Coluans like Brainiac are supposed to have green blood but it's not uncommon for colorists to forget it and color it red anyway.
  • The Sewell family of Copperhead, in addition to having a single eye and two extra arms, bleed gouts of green when injured.
  • One character in Hellboy has yellow blood because his body contains the soul of a worm-like demon.
  • Hulk very often bleeds a dark green. Red Hulk has glowing yellow blood.
  • In the comic adaptation of Jurassic Park when the Tyrannosaurus kills the two Velociraptors, their blood for some reason is colored green, despite it being red in the films.
  • Paperinik New Adventures: Xerbians have black-ink blood, as shown in a flashback. If this still applies to Xadhoom, who became a Physical God and an Energy Being, is up to debate.
  • Even though he's not an alien, That Yellow Bastard from Sin City had yellow blood, since he's incapable of processing bodily waste, which means his yellow blood is... exactly what it looks like due to Rule of Cool.
  • Harry Vanderspeigle, an alien masquerading as a human from Resident Alien, bleeds pink blood.
  • Star Trek: Early Voyages: In "The Fallen, Part Two", it can be seen that the Chakuun have blue blood.
  • The Star Wars comic Jabba the Hutt: Betrayal shows a half-dozen or so Rubber-Forehead Aliens who work for Jabba trying to capture their master for Bib Fortuna but getting attacked by a horde of ravenous weasel-like creatures who kill and eat everything they see - along with Jabba and Bib themselves and four of Jabba's Gamorrean guards. Everyone but Jabba and Bib dies horribly before the creatures can be slaughtered; and the reader has some fun seeing how many different colors of blood all the species shed before the carnage is over.
  • You will get familiar with the bright pink energon that passes for Cybertronian blood reading any of the comic books written (or co-written) by James Roberts (The Transformers: More Than Meets the Eye, The Transformers: Dark Cybertron, special mention going to The Transformers: Last Stand of the Wreckers).
    • There are two exceptions, however: Tailgate's innermost energon is green because he's suffering from cybercrosis, and his innermost energon has curdled, and Brainstorm has a more reddish-orange colour because he's been infected with the Dead Universe.
  • In The Umbrella Academy, following Vanya's transformation into the White Violin, she has grey blood.
  • Wonder Woman (1987): Medusa's blood is blue.
  • X-Men: The Xenomorph Xerox species Brood have green blood, though thankfully without any acidic properties.
  • In the (now closed) comics Gea, the theme is that extradimensional beings live on the Earth and are the basis of every myth or religion. As in Men in Black, they try to live under cover, enforced by the Guardians ("Baluardi" in the original), such as the main character. Even when outsiders are outwardly identical to humans (not so common), expect them to be killed in a gore splash of weird blood and alien organs. In one particular case, a team of racist vigilantes kills a group of "outsiders" living in a slum, and are horrified to see that they bleed yellow, smelly liquids. The leader opts for a "foreign disease" and orders the bodies to be burnt.

    Fan Works 
  • In the Mass Effect/Robotech crossover Protoculture Effect, Shepard is revealed to have green blood when he gets injured. He explains that this is because he's a quarter-Invid.
  • In The Last Daughter, it turns out that Taylor, who is a Kryptonian in the story, has bright pink blood.
  • In Diaries of a Madman changeling blood will always be green, no matter what species they're currently posing as. The protagonist of the story, Navarone, also gains this after his Emergency Transformation, going from regular human blood to a more viscous amber blood.
  • As a Utopian Android The Headmaster in Royal Heights is revealed to have a metallic silver fluid for blood after Yuck kills her by slicing her open with his sword.
  • In Actually, I'm Dead, after dying and subsequently being brought back by the Alicorn Amulet, Trixie's blood appears to have turned black. It is later revealed that concentrated dark magic has replaced her bodily fluids.
  • In Hope for the Heartless, the Horned King is shown to have in the place of blood thick and blackish substance that is called blood only because of the lack of a better term.
  • The New Adventures of Invader Zim:
    • Irkens are shown to have dark green blood. Which is apparently not edible to vampires, incidentally.
    • Norlock has a black ichor in place of blood.
  • My Little Pony: Nakama is Magic: When the Straw Hats manage to finally actually wound him, Discord spits up green blood.
  • In the works of Detsniy Off Skiword, it's often said that the undead have no blood, so upon sustaining heavy damage, they instead spew out oil.
  • In My Brave Pony: Starfleet Magic, Grand Ruler Celesto, a deity alicorn, has a blood type that sparkles.
  • Guardians, Wizards, and Kung-Fu Fighters:
    • Lurden blood is noted to be thicker and a darker shade of red than that of humans.
    • Sniffer's blood is a sickly green.
  • In Equestria: Across the Multiverse: Celestial Ponies, alien ponies from the planet Stellaria, have glowing pink blood. Black Star, a Stellarian supervillain, has black blood due to being mutated by her Void Prism. Celestial/Equusian Pony hybrids like Brightglow and her sisters have a lighter red blood than normal ponies that glows like the Celestials' does.
  • The characters in the Splatoon fic First Aid Kits and Deep Secrets bleed blue. This is because they're evolved from squids and octopuses.
  • Discussed in My Fluttering Heart. Shining always imagined that Chrysalis bled an abnormal green, but it turns out she bleeds red like a normal pony. Shining finds it unnerving since it makes it harder to dehumanize her.
  • In Prison Island Break, Shadow Robotnik is repeatedly mentioned as having black blood while everybody else clearly has red blood, because he is canonically part alien.
  • As is implied in Splatoon 2, Inklings and Octolings in I've Got Your Back have ink running through their veins instead of blood. The ink presumably matches a character's coloring, as Marina's ink is teal.
  • In Zim the Warlord: Irken Reversion, Irken blood is shown to be pink. And when Zim tastes some at one point (It Makes Sense in Context), he notes that unlike human blood, it tastes sweet rather than metallic. Also, it turns loose and greasy as it coagulates, instead of thickening.
  • Subverted in Their Bond. After finding Zelda bleeding out from a suicide attempt, Impa makes a split decision to take her to the Twili Realm for help. She tells herself that she's lucky the Twili share the same blood as the Hylia, or else the blood transplant would have failed.
  • Averted in Remnant Inferis: DOOM. The demons bleed the same blood as any other human or Faunus. This makes them very disturbing for the Beacon students to fight.
    Ruby (thoughts): Who would have thought demons could bleed so much. Or even bleed the red stuff at all.
  • One Hell Of An Afternoon: Taylor's blood is green and glowing now, like the vat she got dumped into, which concerns her a bit.

    Films — Animation 
  • Hercules: The Hydra's blood is green slime.
  • In Interstella 5555, Shep's blood is yellow.
  • Stitch's blood from Lilo & Stitch is pink, as seen when Gantu extracts some to put into some gun turrets so they will lock onto his every move if he tries to escape.
  • Though not seen directly, one song sung by residents of Halloween Town in The Nightmare Before Christmas mentions being "beaten black and green", suggesting this is the case.
  • Rahu and Ketu (who are definitely not human)'s blood in The Return of Hanuman is green.

    Films — Live-Action 
  • In Tim Burton's Alice in Wonderland (2010) the Jabberwocky's blood is purple.
  • The Xenomorphs in Alien have yellow, highly acidic blood that can burn through steel, while the androids have milky white fluid inside them instead of blood. In the later movies, the blood is green instead, possibly as a result of morphing with human DNA. A reasonable theory, however would be that the acid doesn't actually have the same purpose as blood — it's more of a defense mechanism that makes its victims reluctant to kill it.
  • Attack of the Eye Creatures: The Eye Creatures have very thick, blackish brownish blood. It looks very sickening.
  • Many viewers mistakenly assume that the Penguin (Danny DeVito) in Batman Returns has greenish-black blood, since he's seen spitting up a substance of that color in his death scene. However, we also see him bleeding red blood from his bat bite wounds, and according to the crew members, it's supposed to be bile, and it can be seen trickling out of his mouth at multiple points in the film, it just intensified after he fell into a pool of toxic waste.
  • Critters: The Crites have green blood.
  • The Strangers from Dark City melt into goo or turn red and dissolve into flakes when they die; the dead human bodies they use as vessels have black blood.
  • The Dark Crystal: The death of All-Maudra Mayrin seems to indicate Gelfling blood is pink. However, all of the comics depict their blood as deep red like that of humans.
  • In Demon Knight, the Collector and his minions' blood is green.
  • In The Devil's Rain, the members of the satanic cult bleed green or brown blood after they've surrendered their souls to Satan.
  • Averted in District 9, where the Insectoid Aliens bleed a scarlet red. Possibly done to show that despite their appearance, they are not monstrous at all. Zigzagged with Wikus, who at one point has a nosebleed of a black fluid and vomits up black goo, but still bleeds red.
  • Buckets of black and green Deadite blood get thrown around in the Evil Dead movies.
  • The Fifth Element: Diva Plavalaguna, the alien opera singer, has royal blue blood.
  • Flash Gordon:
    • Ming the Merciless has dark green blood.
    • The prince Ming stabs in the first court scene has blue blood.
    • When Klytus, Ming's Dragon, gets Impaled with Extreme Prejudice on a bunch of spikes, his entire body melts into black fluid.
    • General Kala's blood is also black, although she doesn't melt.
    • The Arborian who dies of the Hand in the Hole trope has pale green goo on his stung arm, but it's unclear if it's meant to be his blood or the creature's venom.
  • Freddy's Dead: The Final Nightmare: Freddy bleeds green when he slices his fingers off.
  • Not quite aliens, but one of the first hints that the employees of the Titty Twister in From Dusk Till Dawn aren't human is a close-up of a knife which was just used to stab one of them. Instead of blood, it's covered in a translucent goo.
  • The monster Gamera has green blood. Not that it's ever likely to be useful as The Reveal, but notable anyhow for the sheer volume you will be seeing in any given movie — that turtle bleeds like a Garbage Wrestler… His enemy Gyaos' blood was pink.
  • The Tao Tie from The Great Wall bleed green blood, befitting their emerald-jade appearance.
  • From Green Lantern, when a freaked-out Hal is trying to help a dying Abin Sur:
    Hal: Hey-hey-hey, listen, we're gonna get you to a hospital, okay? Okay? One th-th-that carries...purple blood.
  • The aliens from The Green Slime: killing them is a bad idea because the puddles of light green blood will eventually regenerate into numerous more creatures.
  • Halloween: The Curse of Michael Myers: Michael bleeds yellow-green blood while Tommy beats him with a pipe.
  • Hellboy:
    • Karl Ruprect Kroenen from Hellboy has sand instead of blood. He's not an alien, but a Nazi cyborg zombie who's been through more than Rasputin. It's simply the years of abuse and being in a state of undeath that caused his blood to dry up. Also in the Hellboy movies (and animated movies, but not the comics), Abe Sapien has blue blood.
    • In Hellboy II: The Golden Army, the elven royalty has greyish yellow blood.
  • In Disney's John Carter, Martians have blue blood. Despite all references to their blood in the books indicating that it was red.
  • In Leprechaun 4: In Space, the Leprechaun goes into outer space and teams up with an alien princess. The princess looks just like a sexy blonde human woman (think Anna Nicole Smith with a very upper-class American accent); but then the human characters happen upon some samples of her blood...and they're emerald-green!
  • Whenever aliens are blown up in the Men in Black films we see strangely-colored fluids. Mikey's blood is bright blue. Jack Jeebs' is green.
  • The Moorwen from Outlander has bright green blood.
  • The Kaiju from Pacific Rim bleed blue when stabbed, slashed, gouged, plasma blasted, or otherwise maimed. Which happens a lot. Too bad the blood's toxic as all hell, though.
  • The Tall Man in Phantasm gets his hand caught in a door at one point, and the boy cuts off his fingers with a blade. They bleed yellow; the director noted on the commentary that most test audiences were shocked at the unusual color.
  • The flying monsters from Pitch Black have bluish-gray blood.
  • The Predators from the films of the same name have fluorescent yellow/green blood that glows in the dark. As Schwarzenegger famously says in the first film:
    Dutch: If it bleeds, we can kill it.
  • Skyline: The aliens bleed dark purple blood.
  • One of the princes in Stardust has literal Blue Blood. Unknown if it's just because he's royalty, or if all inhabitants of the magical world have such blood, since nobody else in the movie is seen bleeding. Word of God states the decision for the color was made to avoid an "R" rating, with the added benefit of being a visual gag for the character.
  • In Star Trek VI: The Undiscovered Country, Klingon blood is shown to be Pepto-Bismol pink. Likely done to avoid an R-rating as it ends up being splattered all along the walls of the ship. Also in the movie, there's an inversion where an apparent Klingon's regular red blood leads to the revelation that it's actually a human in a Rubber Forehead disguise. In the original theatrical edit of the movie, the unmasking scene was cut, making the scene seem like a bizarre oversight.
  • In John Carpenter's The Thing (1982), blood samples are taken from all the characters and exposed to heat to test which one is the shapeshifting alien. The alien blood, it turns out, is capable of leaping around the room as an independent organism. The character who proposed and carried out the test did it because he figured that the blood might well do that, as severed pieces had previously been observed operating independently.
  • Most of the Graboid blood seen in the Tremors films is an orangish-red color, just different enough from the maroon-red of human blood to avert an R rating.
  • In The Watch (2012), the aliens' blood is a green goo which (according to Bob) has the feel and texture of human cum.
  • In the film adaptation of The Witches, most of the witches' blood is green when they are killed as mice, although some red blood is seen on the knives and cleavers the hotel staff use to kill them.
  • In The World's End, the alien robot replacements for the townspeople all have blue "blood".
  • Xtro: Sam's quadruped alien form appears to have orange and thick, almost gelatinous blood, most evident when he is accidentally hit by the couple's car, and the driver examines his wound. His second alien form has black blood.
  • In Yamato Takeru, the Yamata no Orochi has lime-green blood.

  • Inverted in Animorphs. Andalite blood is blue-black, but Elfangor and Arbron are squicked out when they find that humans have red blood. Hork Bajir have black blood, Taxxons have a sickly yellow.
  • And The Devil Will Drag You Under by L. Sprague deCamp had a race of alien demons with blue blood. "Not dark blue, but a nice, pretty sky blue."
  • Sympaths bleed blue in J.R. Ward's Black Dagger Brotherhood series.
  • In Robert E. Howard's "Rogues in the House", Conan the Barbarian professes to believe that Nabonidus has black blood when offering to cut his throat and see what color it is.
  • The City of Brass: Full-blooded daeva have distinctive black blood. In one infamous pogrom against human-daeva hybrids, an entire town's population was scourged to root out everyone who bled red.
  • Discworld elves have green blood too — just like some other famous fictional beings with pointy ears. The explanation is that they have copper based blood, since elves are allergic to iron.
  • Doctor Who Expanded Universe: The Venusians in the novel Venusian Lullaby have blue blood.
  • The K'da of Dragonback have black blood, which shows through their scales when they go into battle mode, making them look even more intimidating.
  • The dragons from Anne McCaffrey's Dragonriders of Pern series have green, copper-based blood.
  • White Court vampires from The Dresden Files have blood that is slightly, yet noticeably paler than that of normal humans. In fact, this trope is so common among the Dresdenverse's many, many kinds of monsters that by the later books, "Bleed for me" has become the standard test for a mortal trying to decide whether to invite a stranger into their home.
  • Averted in The Forever War. "All God's creatures got hemoglobin."
  • Fortunes of War: Dreadnought! features two instances.
    • A pointed reference to Vulcans having green blood is made when Piper describes Sarda blushing in shame ("going olive", as she describes it) at the commendation ceremony for his research.
    • Piper learns the hard way that Merete and others of her species have lavender blood. She uses the stains on her uniform to galvanize her anger toward the book's villain, whose attacks on their ship led to Merete's injuries.
  • Humanity in Robert Reed's Great Ship universe have very dark red, almost black blood due to the huge amount of genetic engineering and extra bits of DNA and cells in their bloodstream. The Remoras, twisted by radiation and their own tailored viruses, often have odd blood — one of the characters, Orleans, has very thick black blood.
  • Elves in Simon R. Green's various urban fantasy novels have golden blood. So does Ishmael Jones, an alien in human guise.
  • Harry Potter:
    • Unicorns in this universe have mercury-like silver blood, which is powerfully magical and will heal but curse you if you drink it.
    • Dragon blood is either green or red, depending on the movie / source. Of course, there are different breeds...
  • Isaac Asimov's "Hostess": The aliens from Hawkin's Planet are yellow-coloured, six-legged space cows. Their blood is clear, and Dr Asimov goes into detail, explaining how the lack of metal in their bloodstream makes it colourless.
  • In Inheritance Cycle, Lethrblaka blood is bluish-green, like aged copper.
  • In the Jacob's Ladder Trilogy, the Transhuman Exalts have blue or purple blood due to the nanomachine colonies in their bodies. This is noted to affect their skin and eye color as well, particularly Tristen Conn, who's albino.
  • The ktrit'zal in Junction Point have neon-orange blood that smells faintly of lilac, while the tianlong have sky-blue blood.
  • Denizens of the House in Keys to the Kingdom have blue blood, and some of them, including Arthur due to The Corruption, have golden blood.
  • The Orcs and Trolls in The Lord of the Rings and its associated works have black blood.
  • The Machineries of Empire: The clone of Jedao gets a Tomato in the Mirror realization when he gets shot and suffers no worse effect than a trickle of thick black blood. His body turns out to be a genetic engineered voidmoth, the same species that form the chassis for the Hexarchate's Living Ships.
  • Many dragons, in all forms of media, have boiling blood, including in The Malloreon.
  • Mindwarp: The protagonists all discover superpowers on their thirteenth birthday, and their blood turns silver, the first real sign that they're not 100% traditionally human.
  • In Jay Aury's Monster Girl Tower, elves bleed sap, just as a plant would.
  • It took nineteen books and a bad-luck-induced paper cut to find out that Aahz from Myth Adventures has yellow-green blood.
  • In the Nemesis Saga, most of the Kaiju bleed brown blood. Nemesis, on the other hand, bleeds red blood like a human.
  • Mr. Croup and Mr. Vandemar from Neverwhere don't even bleed when wounded—just another sign of their inhuman nature.
  • The main characters in Robert A. Heinlein's The Number of the Beast discover the "ranger" hassling them isn't human when they discover that "he" has blue-green blood.
  • CDF soldiers in Old Man's War have their blood replaced with SmartBlood, a gray nanotech fluid that carries 4x the oxygen that human blood can and which can instantly seal wounds and even be commanded to ignite remotely in case something drinks your blood (or if you spit some of it in an attacker's eyes).
  • In The Pride of Parahumans, Parahuman blood is so thick with hemoglobin that it looks black. As does their muscle tissue.
  • The Sekoi of Relic Master bleed amber, to further emphasize their alien nature.
  • The demons in Armageddon: The Salvation War have yellow, green, and acid blood. Not an instance of the Rule of Cool, however. They've been evolving in a very different environment for the past 5 million years. Quite possibly the colors have something to do with the environment… The angels in the sequel have silver or white blood. For both species, blood color was observed to function like blood groups in humans for purposes of transfusions.
  • There are several examples in The Shadowhunter Chronicles.
    • Vampires still have red blood, but that red is much lighter than human blood.
    • Demons tend to have black blood. Every demon. It is also often slightly toxic if someone accidentally drinks it or if it gets into an open wound.
    • Angels basically have golden and shining blood.
    • Emma Carstairs once killed a fairy in battle who had green blood. However, it is not known whether all fairies have green blood or only a few have green blood.
  • S.L. Viehl's Stardoc: Jorenians have green blood. And a few other odd anatomical traits.
  • Star Wars Legends:
    • The Yuuzhan Vong of the New Jedi Order series have blood that is a shade of blue so dark it's almost black.
    • Averted by the Chiss (Grand Admiral Thrawn's species), who, despite their periwinkle-blue skin and glowing red eyes, bleed ordinary red blood. This is because the Chiss are actually long-lost human colonists from the pre-hyperdrive era who mutated as a result of the chemicals in the atmosphere of their adopted home planet of Csilla.
  • The Stormlight Archive: The Parshendi have orange blood, and chasmfiends have purple blood, both of which are described as having a moldy smell. This similarity of the various lifeforms on Roshar hints that Humans aren't actually native to the planet.
  • In Neil Gaiman's short story A Study in Emerald, an alternate-universe re-imagining of "A Study in Scarlet", the central crime scene is splashed with green blood, since in this universe all those of noble blood are descended from Lovecraftian Elder Gods.
  • Temeraire: Dragon blood is a red so dark it's almost black, which makes it quite easy to tell after a battle whether an Aerial Corps Dragon Rider is injured or it's Not His Blood.
  • In Wen Spencer's Ukiah Oregon series, Ontongard/Pack blood will coalesce into mice, insects, or other small animals and flee. The original owner, or another member of the same species, can later reabsorb the animal, gaining memories stored therein.
  • The Martians from The War of the Worlds are a strange case in that they have no blood. And no digestive system. They obtain oxygen and nutrients by removing blood from other species and injecting into their own bodies.
  • The IceWing dragons in Wings of Fire bleed blue blood unlike the other red-blooded dragons.

    Live-Action TV 
  • In The 100, "Nightblood" — pitch-black blood, revealed to be genetically engineered to withstand high levels of radiation — is used to identify potential leaders of the Grounders.
  • An episode of ALF ("Someone to Watch Over Me") has the following:
    TV Reporter: This quiet suburban home [referring to the Tanners'] is about to run red with blood.
    ALF: [gasps] Oh, wait, why am I worried? My blood is green.
  • Doyle, an android in Andromeda "bleeds" superconductor fluid when cut. Due to her in-built Weirdness Censor, she sees it as ordinary blood, thinking herself human.
  • Babylon 5: The Drazi have white blood. On the other hand, the other major races — the Minbari, the Centauri, and the Narns — have red blood.
  • This happened a couple of times in Brimstone, where someone Stone suspected of being one of the 113, was revealed to be human because they bled.
  • In the Buffy the Vampire Slayer episode "Earshot", a mouthless demon's fluorescent blood splashes onto Buffy's hand and gives her an "aspect of the demon", which turns out to be hearing people's thoughts. Similarly, in the Angel episode "I Will Remember You", the title character is "infected" with demonic blood that cures him of his vampirism. It's bright neon green.
  • The Dark Crystal: Age of Resistance: When Mayrin, leader of all Gelfling Clans, is struck down by the Skeksis General, she bleeds pink blood.
  • In Defiance, Castithans have pink blood, which looks like a strawberry milkshake, while Indogenes have clear blood.
  • Doctor Who:
    • In "The Tomb of the Cybermen", Cyberman blood is white.
    • The Daleks, as well as Davros himself, all have green blood. It can then be assumed that the rest of the Kaleds, before their mutation, also had green blood as well — although the Tenth Doctor remarks in dialogue that Kaled blood is the same as human blood but a little purpler.
    • Time Lord blood has been subject to Retcons:
      • In "State of Decay", the Doctor's blood is blue. In every other episode of the series where he (or other Time Lords) bleed, it's red. Reportedly, Fourth Doctor Tom Baker insisted on his blood being blue in that story for reasons known only to himself.
      • The Expanded Universe goes with the idea that Time Lord blood is just a little bit brighter or oranger than human blood. It's sometimes described as basically red, but "orange-ish". (This was partially an attempt to explain away the slightly too bright fake blood used by the BBC's special effects department in the 70s.)
      • In the movie it's red, but is different enough from human blood on a cellular level that Grace describes it as "not blood" when she looks at it under a microscope.
    • Strangely, a scene from "Warriors of the Deep", Episode 4, indicates that the Sea Devils have green blood. This is odd because this particular species is not alien, but rather a race of intelligent Earth reptiles. Perhaps their case is similar to the real life green-blooded skink (Prasinohaema virens)?
    • The Sontarans have green blood, as seen in "The Two Doctors".
    • Mr. Sweet from "The Crimson Horror" has green blood.
  • Falling Skies:
    • Averted with the Skitters, they bleed red as any human (which we get to see on several occasions when their heads blow up real good.)
    • The Espheni on the other hand have blue blood.
    • The Volm bleed dark purple.
  • In Farscape, Luxans have clear blood which turns to black when they get hurt. Black blood is toxic, thus the bleeding has to be stimulated until it turns clear again. Nebari have dark blue blood. Delvians, being humanoid, sapient plants, bleed a sap-like substance.
  • The Gifted:
    • Marcos "bleeds" sunlight. It's later clarified that he has blood just like anyone else, but his powers charge his cells with energy that has to dissipate before it looks like normal blood.
    • Glow has light-infused blood like Marcos, though not quite as powerful.
  • In Humans, synths have a blue fluid that looks like blood flowing through them.
  • Basco ta Jolokia of Kaizoku Sentai Gokaiger is shown to have light bluish-green blood when he dies.
  • Kamen Rider Blade has the Undead, who bleed green. This serves as a Chekhov's Gun as one of the main characters is an Undead himself and another main character becomes an Undead in the finale, and they both bled this color. The gun goes off cross-series, as in Kamen Rider Decade, the Big Bad of Ryuki's world turns out to be an Undead. This gets carried over in Kamen Rider Zi-O, where both aforementioned main characters get their Undead powers stolen, and their blood immediately turns red to signify that they've become human again.
  • The Outer Limits (1995):
    • In "Promised Land", the Tsal-Khan's blood is black.
    • In "The Voyage Home", the alien's blood is green and slimy.
    • In "The Grell", the titular race's blood can alter DNA, meaning that a human who is exposed to it will turn into a Grell.
    • In "Manifest Destiny", the Trion have yellow-green blood. Given that it is rich in copper, it is highly conductive of electricity.
    • In "A New Life", Father's species has bright green blood.
  • The Outpost: Talon's people are known as "Blackbloods" for the fact that their blood is literally colored black.
  • Power Rangers: A reversal occurs when a villain's human nature is revealed when he does bleed human blood. There was also something of a straight example with Lipsyncher, who "bled" lipstick when her cheek was scarred by Jason's sword.
  • The alien teenagers of Roswell have both blood and saliva that looks normal to the naked eye, but not under a microscope.
  • While Human Alien Clark Kent bleeds red blood on the few occasions he's hurt enough to bleed in Smallville, cyborg human Victor Stone (Cyborg of Teen Titans fame) bleeds black mech fluids, keeping in line with the comics. This does not carry over to the Teen Titans cartoon, where it appears to be clear.
  • Stargate SG-1:
    • An episode has the team realize something is amiss when an attempt to draw blood from O'Neill yields silvery-white fluid instead.
    • Goa'uld have blue blood.
    • In another episode the first indication that a bounty hunter isn't human is that his blood is green.
  • Star Trek:
    • Vulcans have green copper-based blood, not unlike Earth insects.note  To a limited extent, Star Trek did Shown Their Work in that Leonard Nimoy's make-up did tend towards a more greenish cast than everyone else's. It did take several tries, however, to get this to work the way they wanted when combined with the lighting and the other make-up, which occasionally had hilarious results—especially in early episodes of the show.
    • While the pigment in Vulcan and Romulan blood may use copper similarly to how human blood uses iron, the pigment would not be all that much like hemoglobin. The usual color of copper-based respiratory pigments in Earth life (which are similar to hemoglobin) is blue.
    • Parodied in a comic by Mark Parisi (Off the Mark, August 4th 1996), which shows a movie theater on planet Vulcan. The father reassures his son that what he sees on the screen is not real blood, just guacamole.
    • In the movies, Klingons have pink blood. Ironically, Star Trek VI, which introduced the Klingon Pepto-Bismol Blood, shows a Klingon bleeding red blood in a climactic scene - at least in the theatrical version. Video releases restored a scene cut from the theatrical release explaining this (the "Klingon" is really a human wearing a rubber forehead).
    • The shapeshifters of Star Trek: Deep Space Nine once caused some paranoia over their infiltration capabilities. As such, Starfleet briefly initiated required blood tests of officers and their family, as any of the shapeshifters' substance removed from their body would instantly revert to their protoplasm. Reassuring? Not quite, as Captain Sisko's father proceeds to point out that if he were a shapeshifter, he'd just kill some poor shlub and use their blood to get around the test. The fact the idea is introduced by someone who later proved to be a changeling infiltrator didn't help.
    • The Andorians have blue blood, which is just icing on the cake since they also have blue skin and antennae. Bolians also have blue blood (and, again, blue skin).
    • Cardassian blood is black. This also applies to other animal life native to Cardassia Prime, such as the raw fertilized taspar egg Picard ate in "Chain of Command".
  • In the TV series spin-off of V the distinctive reverberation of the Visitor's voices was dropped due to the expense of sound dubbing, and the Visitors were given cliché green blood instead. Some viewers missed the plot point about a human who'd cut his hand actually being a Visitor infiltrator, as they lacked a colour television at the time.
  • The alien human hybrids on The X-Files bled green blood that could produce a deadly gas (to non-aliens) when exposed to the atmosphere, as did the aliens themselves. This got lampshaded in a heartbreakingly awesome way in "The Unnatural". Ironically, this means that Mulder could see an alien-human hybrid bleeding, and not know there was anything weird going on because he's red/green colorblind!

    Mythology and Religion 

    Tabletop Games 
  • The Nephilim of Malifaux have black blood that burns any non-Nephilim that come in contact with it.
  • Warhammer 40,000 has a number of different takes on this:
    • In an aversion of the "Human Aliens have coloured blood and pink skin" error, the Tau do not look like humans partly because they have deep blue-purple blood (their equivalent of haemoglobin uses cobalt instead of iron), which has the expected effect on their skin tone. In one of the Ciaphas Cain novels, Amberley Vail notes that it smells horrible.
    • The Orks, who are in fact genetically-engineered carnivorous space-fungi, have green skin but red blood (and mouths). It wasn't always this way and earlier sourcebooks for the game described Ork blood as green, but eventually red gore was decided on. This was explained in White Dwarf magazine with an in-universe biologist's report: while Orks' dense green skin is a chlorophyll- and spore-producing layer, the rest of their body is relatively normal meat, and they have a normal (if supercharged) food-based metabolism to support it. On the same page, the game developers gave the real reason: green injuries on green-skinned aliens were hard to notice, and made the models look like "they've had an accident eating a gooseberry squishy". Some sources have indicated that the Orks' blood does double duty as their equivalent of a lymphatic system, and that the colour of the blood will as a result vary depending on their diet, ranging from bright crimson to almost black.
    • The Eldar have red blood like humans, but it crystallizes instead of forming scabs.
    • On the transhuman spectrum, Space Marines are sometimes mentioned in-universe to have extremely bright red blood, due to its efficiency in transporting oxygen. Some also have corrosive or otherwise dangerous blood as a further defense against attackers.
  • Warhammer Fantasy: Older editions allowed Chaos Champions and mutants to gain this — as Lovecraftian Superpowers. Some of the types of blood they could have included molten metal, electrically-charged slime, and a symbiotic Blob Monster that reacts to anyone poking holes in its host's skin by sticking Combat Tentacles out through the wounds to try and kill them. The most detailed list can be found in the Tome of Corruption for Warhammer Fantasy Roleplay, which details twenty different kinds of blood replacement.
    • Acid, electricity, fire, molten metal and poison, obviously, are all lethal to your assailant.
    • There are several variants where "blood" equates to "living animals" — centipedes, ants, beetles, leeches, maggots, worms, even mice and small birds. In all cases, these attack the person who wounded you, usually causing minor damage and fighting penalties (birds just cause penalties and mice cause just damage).
    • Excrement (you do not want details) makes you so disgusting that your enemies find it harder to fight you.
    • Eyeballs give you a tactical advantage because you can still see through them.
    • Glue can temporarily stick an enemy against you.
    • Mucous, mud and wax are disgusting, but harmless.
    • Protoplasm means that if you die, a Blob Monster will emerge and attack your killers.
    • Tar will spurt out and make your enemy all sticky, impairing their mobility.
    • Vines will rip into enemy flesh, harming them and impairing movement.
    • Vomit is not only disgusting, but induces mutations.
    • Wind is deafening and eerie.

    Theme Parks 

    Video Games 
  • Alien Breed: In the second generation games, the Breed are revealed to have green blood.
  • Bendy and the Ink Machine is full of life forms who are made out of black ink. Whenever they bleed, they bleed, well... black ink.
  • The Binding of Isaac: Rebirth:
    • DLC bosses Rag Man and Rag Mega both bleed violet. No explanation is given, but it is the same color associated with psychic abilities in the game, and both bosses have at least one trait involving that color. (Homing shots and giant orbs/beams of light, respectively.)
    • Ghost enemies splatter in white ectoplasm when killed, instead of the regular blood that everything else turns in to upon death.
  • Bloodborne: Some creatures bleed grey or green. The Plain Doll bleeds white. And that's not counting the blood of an Eldritch Abomination that underpins the plot.
  • In Blood Omen: Legacy of Kain you play a vampire whose health bar is a blood bar, so NPC blood is Colour-Coded for Your Convenience: Red blood restores your health, the blue blood of ghosts restores your mana, black blood lowers your health, and green blood poisons you.
  • Combat Instinct: While the Gnork has red blood, the Hrumians have purple blood.
  • Discussed in Cthulhu Saves the World: Umi asks the blood types of her allies, and Cthulhu answers he's got ink for blood. Similarly, Paws, an alien resembling a cat, says he's got uranium for blood while Ember the demon dragon says to have acid for blood.
  • Androids in Detroit: Become Human are powered by a fluid called Thirium, colloquially dubbed "blue blood" since that's essentially what it is.
  • From the Devil May Cry series: Devil May Cry 3: Dante's Awakening actually has creatures "bleed" appropriate to what they are — sand, ichor, impact sparks, whatever. In Devil May Cry 4, only half-humans bleed red, while organic demons have blue, green, or orange blood instead.
  • In Diablo III when the angel Imperius is wounded in a cutscene his blood is white and glows, in keeping with angels being creatures of light rather than flesh and blood.
  • Divinity: Original Sin II: The Voidwoken, the game's primary villains, have cursed blood that appears dark and swimming with leeches when spilled. It also inflicts a Revive Kills Zombie effect on contact.
  • The Cacodemons and Barons of Hell in Doom appear to leak blue and green fluids when they die, even though their blood spatter when hit while alive uses the same red color as seen for other creatures in the game. Word of God says this is because both do have red blood, but their innards are blue/green. However it has been suggested that they simply didn't have a way to color-shift the red blood splatter sprites and did not want to waste space on differently-colored graphics. Some modern source ports have remedied this by allowing the blood color to be shifted for different enemies. Doom Eternal depicts both Cacodemons and Arachnotrons with blue blood.
  • Dragon Age:
    • Zig-Zagging Trope in Dragon Age: Origins. Several people, including people who have firsthand experience against them, refer to darkspawn blood as being "black as sin"; however, all blood in the game is animated as a bright red. At one point, the PC can explain that while the idea of the blood being black is a common misconception, it has various inhuman properties: most notably and well known is how toxic it is, with exposure into an open wound being almost universally fatal to anyone but a Grey Warden, and likely related to this is the less obvious fact that it burns the skin on contact.
    • In the Dragon Age: Inquisition DLC "The Descent", it emerges that lyrium itself is the distinctly alien, multi-purpose "blood" of massive subterranean creatures called Titans. Amusingly, magic involving *normal* blood is shunned and reviled by most of society. One wonders what the reaction will be to this news spreading.
  • Like all things Dwarf Fortress, there are different colors of blood based on the creature that bled it. Which, like all things Dwarf Fortress, can be modded to taste. Someone even made a Homestuck (below) troll mod covering the entire hemospectrum. In the base game, troll blood is a bright cyan, some sea creatures bleed dark blue (based on their real life counterparts), fire imps have gray goo in the place of blood, and invertebrates have white "ichor."
  • The Ghost People of the Sierra Madre in Fallout: New Vegas bleed green, but this may not be blood since their insides apparently have a slushy like consistency, so what leaks out of them is the liquid part of the slushy.
  • Cyborgs of all varieties in Far Cry 3: Blood Dragon, including the player character Rex "Power" Colt, all have blue blood. Poked fun at in a late-game cutscene where the Big Bad tries to tell him that they both have the same blue blood, to which Rex replies that, no, his blood is red, white, AND blue.
  • As they did in Classical Mythology, the gods of Hades bleed golden ichor instead of red blood. The exception to this is the protagonist, Zagreus, whose red, humanlike "weak blood" is occasionally brought up as a subject of derision.
  • The aliens (and the cockroaches, which is Truth in Television, see below) in Half-Life bleed light yellow.
  • In the Halo universe, Elites and Jackals have purple blood, Hunters orange, Brutes and Prophets red, Grunts luminous blue, and Drones whitish green. The Flood are a different story: they don't bleed just blood; Infection Forms will liquefy the internal organs of the host, so in reality they're spilling out their entrails in liquid form. Unless the "Grunt Birthday Party" skull is enabled, in which case headshots will cause the Grunts to bleed confetti and cheering.
  • Hyper Light Drifter: The Player Character's blood is a shimmering magenta fluid that evaporates quickly. Occasionally, fits of a mysterious illness cause them to cough it onto the ground.
  • The ant-like enemies found in Jet Force Gemini bleed green blood when you shoot them; and a special "cheat code" makes them bleed rainbow colored blood.
  • The Legend of Zelda:
  • In the Marathon series, most Pfhor (fighters, troopers, enforcers and minor hunters), ticks, lookers and simulacra have fluorescent yellow blood, major hunters and Mothers of All Hunters bluish-gray, F'lickta mixed green and red, hulks blue, S'pht green, and wasps and tank-cyborgs purple.
  • In Mary Skelter: Nightmares, Marchens bleed glowing pink blood. Just to show that this isn't censorship: Jack, a human, bleeds the usual red blood.
  • In Mass Effect, a common taunt directed at humans who express conciliatory philosophy toward the varied races of the galaxy is "Do you remember what color your blood is?" Just for fun, stand up to the leader of the isolationist "Earth First (we can exploit the other planets later)" Terra-Firma party.
    • Strangely, several non-council races have the same red coloured blood as humans, namely batarians, vorcha, and quarians. Others colours include blue Turian blood, orange Krogan blood, green Salarian blood, blue-purple Asari blood, light green Rachni blood, and yellow Collector blood. A Keeper shot by Saren can be seen bleeding black fluid, which is quite possibly artificial, given that they have been heavily bio engineered. Geth are fully synthetic, but "bleed" white fluid when killed.
    • Thorian creepers don't bleed per se, but they do generate splatters of brownish-green material when they die.
    • Blood colors in ME also qualify for Shown Their Work credit, as species with alternate colors of blood have skin and/or mucous membrane coloration to match (asari, who bleed purple, have various tones of blue or purple skin as well as lightly blue-tinged sclerae; krogan, who bleed orange, can exhibit red or yellow eyes; Garrus and several other light-colored turians have a faint purplish cast to their facial features).
    • The krogan have another odd variant on blood, as well. They don't actually have a nervous system made up of nerve cells; rather, they have a second circulatory system consisting of an electrically conducive fluid that runs through their body. As a result, krogan cannot be paralyzed. This physical trait was evolved by just about every species on Tuchanka, the krogan's homeworld.
    • Shown in practice in Mass Effect 2, when Garrus gets shot during his recruit mission, and bleeds blue all over the floor, and is later seen with purple scar-tissue over third of his face, mostly covered with cybernetics.
  • Metal Gear:
    • In Metal Gear Solid 4, Supersoldier Raiden has white nanomachine-based blood, the potential symbolism of which is not lost to Vamp.
    • In Metal Gear Rising: Revengeance, cyborgs use a more advanced artificial blood that is red (except in the Japanese version, where it is still white due to censorship) that does not require the frequent dialysis that the original white blood did.
  • Monster Hunter has the Neopterons. They're not aliens, but rather oversized insect-like monsters (the smallest is at least as big as the hunter's torso). Just like a real world insect, their blood is green, especially noticeable with Neopteron Large Monsters. 4 introduces the Gore Magala, an enigmatic new monster with purple blood, that is the source of a deadly virus that spreads to humans and monsters. While there is no physical change for humans that are infected, infected monsters start spilling purple blood when hit with attacks as well. When a Neopteron gets frenzied, their blood is ALSO purple despite a healthy Neopteron having green blood initially, showing just how much the virus can corrupt a monster's physiology.
  • In the Mortal Kombat games, Reptile, Khameleon and (until recently) Sheeva have green blood. Cyborgs have black oil instead of blood, Blaze has molten lava, D'Vorah has blue fluid, Noob Saibot has black... wraith juice and Cyber Sub-Zero bleeds a light blue combination of oil and antifreeze. Some guest fighters also have different colored blood to match their original franchise: Predator has bright green blood while the Xenomporph has yellowish-green blood (which, due to Story and Gameplay Segregation, is only acidic for certian moves). Spawn also has green blood and Robocop has the same black blood as other androids.
  • In Mutant Football League, aliens bleed neon green when hit, and explode in a shower of acidic blood when killed. Nearby opponents will be either killed, benched due to low health, or softened up for a deathblow in the next few downs. This means that trying to cripple the all-alien Galaxy Chaos team by killing their stars will deplete your own defense significantly
  • Nanobreaker had various robot/cyborg enemies, and a menu where you could decide what of wide range of colors of "blood" they would bleed as you viciously dispatch them with your shapeshifting sword. For great humor, select the "random" option, and turn your battlefield into a particularly colorful impressionistic painting!
  • Clowns in Penny Arcade Adventures bleed rainbow colors.
  • The Maians in Perfect Dark have green blood. The Skedar, meanwhile, have red blood.
  • Ratchet & Clank: It's rare, but some enemies spew green slime when killed, such as the frog/toad enemies.
  • Resident Evil:
    • Resident Evil 3: Nemesis has the Nemesis monster bleed red when shot at, but when he gets knocked out after taking enough damage, his pool of blood is purple.
    • The ending of Resident Evil Gaiden zooms in to show Leon bleeding green blood, implying he's actually the B.O.W. Parasite in disguise.
  • SaGa Frontier- Mystics have blue blood, Half-mystic protagonist Asellus has purple.
  • If you go through Skullgirls's character profiles, you may see a few unusual blood types. Painwheel has SG (Skull Girl), Squigly has "Embalmed" (undead), and Big Band has B♭ (oil mixture, being a cyborg). Eliza has "Any".
  • Shadow the Hedgehog: The Black Arms have green blood. Also a case of Black Blood, as it was going to be red before the developers had to change it to avoid a T rating.
  • Splatoon: The Inklings could be considered a somewhat non-standard version of this, as they're literally made of ink, which presumably fulfills the same functions that blood does, right down to splattering everywhere when they're killed.
  • A major plot point in Star Ocean 1 is that Fellpool have copper-based blood - but everyone from that planet has properly pink skin (or tan, in the case of the Highlanders). The only outward difference from Terrans is their tails and sometimes fangs.
  • Unreal series:
    • The Mercenaries in the original Unreal have green blood. Averted with every other alien race, however, which all bleed the same red blood as the player character.
    • The Necris of Unreal Tournament bleed a black substance called "nanoblack" rather than regular red blood.
  • Orcs from Warcraft (even though they are native to a planet called 'Draenor') have very dark blood, which is why many of the more or less racist humans call them blackbloods. Similarly, the blue skinned draenei have blue blood. That, and their unguligrade appearance has caused a few fans to compare them to the above mentioned Warhammer 40k Tau (although people are even more likely to compare draenei to Protoss). Demon blood seem to be fluorescent green (which is pretty much the trademark colour of fel energy) that more than one NPC has compared to "liquid rot". Sufficiently powerful demons have lava instead of blood. Most undead, including the playable Forsaken have green embalming fluid instead of blood.
  • In World of Warcraft, void elves have purple blood.
  • The aliens in XCOM: Enemy Unknown bleed yellow, which you can often see when it sprays on the screen during the autopsies or when it pools on the ground aftter they die. This carries over to ADVENT troops in XCOM 2, which is the first sign that they're not entirely human.
  • Averted in Yume Nikki: when Madotsuki stabs a Dream Land creature, it doesn't matter what it is: be it a bird girl, a giant foot-Martian who cries green tears, a poop monster, a horrified face on the wall, they will always bleed red blood and let out a human-like scream.

    Visual Novels 
  • In Dra+Koi dragons bleed gold. When in human form, this also includes normal human blood.
  • Zigzagged in Marco and the Galaxy Dragon. While many aliens have purple blood and a few have green blood, some—like El Skeleton and Gargouille—have red blood.
  • In Policenauts, the "Frozeners" have white artificial blood, called "first-generation" blood, which is said to be simpler than the "third-generation" blood used on Home (Earth). It's also said to transport oxygen more efficiently than regular blood, making blood loss less of a threat.

    Web Comics 
  • Bloody Urban has Vampires with black blood, and Ghouls with luminous green blood.
  • The Orrotta of Charby the Vampirate have violet blood.
  • Commander Kitty usually features Bloodless Carnage, but that didn't stop Nin Wah from staining the walls blue with Zenith's Tagged goons.
  • The companies from Consolers bleed money, also doubling as a Visual Pun.
  • Terronians in Cordless. Their hair reflects their blood color.
  • The Dreamland Chronicles: Nicodemus -- green.
  • Used frequently in Earthsong. The colors don't always precisely match (Zaebos, a traditionally red demon, has black blood), likely for the same reasons they don't always in humans, but they tend to be darker versions of skintone.
  • The Skut from Enemy Quest possess acidic blood. This was taken advantage of during the war with the Visitors, where the Skut would strap bombs to their backs and ambush human fireteams. Anyone who the blast didn't get was splashed with the stuff.
  • Grrl Power: Maxima. She's a super who might technically not be human any more, and bleeds blue. She still blushes red, though. The author mentions originally planing to have her blush green, but that just made her look ill.
  • In Heartcore, salamander demons such as Carval have navy-blue blood that is highly volatile and ideal for making bombs. Common wisdom dictates that it's a bad idea to make salamander demons bleed. Carval's previous incarnation, Volaster, exemplified this when he bled enough to turn himself into an Unholy Nuke.
  • Both Played for Laughs and Played for Drama in Hooves of Death, as the unicorn soldiers literally bleed rainbows when wounded. While inherently humorous, it doesn't undo the fact that they live amidst a grim Zombie Apocalypse where being torn limb from limb is a real possibility.
  • The trolls of Homestuck have a complex caste system based on the color (thirteen known exist) of their blood. Each troll has a different blood color, spanning the entire color spectrum. The highest castes have literal Royal (Purple) Blood, while the lowest castes have brownish red blood. Trolls higher on the spectrum live longer lives and tend to possess greater physical strength, while rustblood colors tend to have greater psychic powers. Greenbloods (the middle colors) tend to be more emotionally stable. Additionally, Karkat, Kanaya, and Feferi, have rare and special blood-types.
    • Karkat's blood is a mutation — bright red like human and carapace blood. This puts him completely outside (and beneath) the entire hemospectrum and has only been possessed by one other troll in history, his ancestor The Sufferer. As a result, Karkat opts for "blood anonymity" by typing in grey instead of his blood color as all the other trolls do.
    • Kanaya has jade blood, which also lets her enjoy Alternia's blistering sunlight and be awake during the day when the undead normally stir, making her Alternia's Goth equivalent. It also marks her as one of the trolls to tend to the mother grub.
    • Feferi's blood is literally royal purple, making her heiress to the throne, because it physically grants her protection from the Brown Note of her Eldritch Abomination guardian even at its highest level.
    • Each troll's lusus (a monstrous surrogate parent) shares the same blood color as their adopted troll. In addition, all the Horrorterrors share the same royal purple color Feferi and her lusus do.
    • Also, for some reason, troll robots and artificial limbs have blood. Equius uses this to give a rustblood he has a crush on a robot body with blue blood befitting his station. This makes her occasionally prone to violent outbursts, like Equius himself.
    • His Honorable Tyranny, the figurehead monster "in charge" of the Alternian court system has black blood.
    • Cherubs also qualify, with the color depending on which personality is dominant. Calliope has lime-colored blood (same name as an exterminated troll caste, but a different color), while her "brother" Caliborn has the same red as humans do. In fact, Calliope implies that an entire species having exactly the same color blood is very unusual across Paradox Space... apparently humans are the oddballs in this story.
  • In Kill Six Billion Demons, "King of Swords", there's a scene where Solomon David slaughters a horde of challengers of different species from around the multiverse. He uses Supernatural Martial Arts of a kind that easily tears his opponents apart. A couple of them are revealed to contain purple gore rather than red.
  • Our Little Adventure: The Zebroian Outsider has very unique, multicolored, shifting blood, which he and others believe to be cool.
  • The alien that attacked Dykowski in Sluggy Freelance has concentrated orange juice for blood. The bad part, according to the crewmember studying the creature, is that it's the homestyle kind.
    Captain: With pulpy bits? EEEWWWW!
  • Snarlbear: The Snarlbear that Daisy kills has brilliantly hued, color-shifting blood. Daisy has it herself, now.
  • Hall and Eva from Supernormal Step are complete immortals that bleed black when injured.
  • In Tower of God, Ren's creatures are green-blooded. And orange. And red.
  • Unknown Lands: Dark Elves' naturally red blood has been turned blue.

    Web Original 
  • When the leprechaun in The Adventures of the League of S.T.E.A.M.'s webisode "Fool's Gold" is dispatched, he turns into a pile of green goo.
  • The Horribly Slow Murderer with the Extremely Inefficient Weapon: The Ginosaji has black blood.
  • In Madness Combat:
    • A.T.P. units secrete yellow blood, a sign that they have been genetically enhanced.
    • The Madness Combat universe have two different hell and both seems associated with black blood, when Deimos is travelling in the normal hell, he bleed black goop, while Sanford's normal red wound become black shortly after being forced into the Auditor's hell.
  • In Let's Drown Out when Yahtzee explained that the plot of Aquanox 2 revolves around horseshoe crabs, Gabriel waffled of the importance of them, specifically their blood. It is 'milky, kinda blue' and based around cobalt. It is used to test for blood borne pathogens because it reacted violently in any presence of infections.
  • Squid Kid from Metro City Chronicles has black blood.
  • Santa Christ from The Nostalgia Critic loves pancakes, so it's fitting that he bleeds maple syrup.
  • According to the Protectors of the Plot Continuum, Mary Sue characters bleed red or pink glittery blood, or in extreme cases, "only" glitter.
  • In The Salvation War, angelic blood is white or silver, while demonic one is not only often acidic but also either green or yellow.
  • Due to Running the Asylum, it varies, but if the Slender Man bleeds at all, his blood is often black. Injuring him in the first place requires multiple miracles, though, so this doesn't come up much.
  • In the Sock Series:
    • Gaeous the god of dirt can produce a green plant parasitic fluid which serves as their tears and their blood.
    • Uquorion the god of fluid have both purple blood when they gets bitten to death and gray blood when their corpse falls on the ground.
  • Demons are said to always have black blood in Void Domain.
  • Whateley Universe:
    • Carmilla, a student at the Super Hero School Whateley Academy, is mostly-demon, even if she looks like a hot 'urban vampire' goth kid. She bleeds a blackish-purple ichor which is definitely not blood.
    • Same school: Eldritch is a mystical Artificer who bleeds a roughly-blood colored stuff that's too high in metals to be anything a human could have in his/her veins.

    Western Animation 
  • Roger's blood from American Dad! is purple.
  • In the Animaniacs (2020) episode “Bride of Pinky” the zombie and the two monsters Brain bring to life bleed green blood, which is how they were able to get away with it.
  • Danny Phantom: Apparently, ghosts (and half ghosts in their ghost forms) bleed glowing green Ectoplasm...
  • In the Fish Police episode "The Codfather" when the titular character is murdered (or so we're led to believe) his blood is purple.
  • Kif Kroker from Futurama bleeds viscous green blood. It's tangy!
  • Gravity Falls:
    • Both the zombies from "Scaryoke" and the shape shifter from "Into the Bunker" bleed green blood, likely the only reason why the fairly graphic violence against them was allowed on the Disney Channel in the first place.
    • In "The Last Mabelcorn", the titular unicorn is punched in the nose then starts bleeding rainbow colored blood from her nose. Later after Mabel, Grenda, Candy, and Wendy fight the the unicorns, they come back with their clothes stained with blood the same color.
  • A scene near the end of Invader Zim episode "Lice" seems to show that Zim (and by extension, all Irkens) has green blood, as he's skinned and the tissue underneath is green. Of course, considering that Zim's skin is green, it makes sense. Word of God says that Irkens have see-through pink blood.
  • An episode of Megas XLR featured a shapeshifting plant alien. Once Coop discovered its true nature, he formed one of the robot's limbs into a chainsaw and got to work. The scene of the chainsaw going into the creature while green goop flies out goes on for over thirty seconds.
  • Solar Opposites: The Shlorpians blood is blue.
  • The Simpsons: Parodied when Moe is trying to convince a group of kids that he's not a troll because he bleeds red. Then he nicks his finger, and a frustrated Moe sees green blood spurting from the wound.
  • Star Wars: The Clone Wars: In "Children of the Force", Cad Bane gets caught after disguising himself as a clone trooper because he was injured and bled a little bit on the floor of the shuttle, and no one who was supposed to be on that ship had green blood.
  • Steven Universe plays with it: Gems do not bleed, but they do blush strange colors — for Pearl it's teal, while for every other gem it's something close to their various skin colors. Making it even weirder is that as their bodies are Hard Light, they probably don't even have blood.
  • The Twins from Superjail! have green luminescent blood, as shown in "Combaticus", while their father has a more saturated lime color. This could be artistic license or the colorists having forgotten the glowing detail. Other aliens shown in the series are also shown to bleed in green. On at least two brief occasions, the Twins have been depicted with red blood (after being crushed in "Combaticus", and with bleeding from their ears and noses in the ending of "Troubles with Triplets") which could either be a coloring error or another artistic choice.
  • Most of the alien blood in Sym-Bionic Titan is green.
  • Agent Bishop from Teenage Mutant Ninja Turtles (2003) seems to have this as a result of his alien-altered physiology; after he was impaled by a hook in one episode, one could briefly see a thick, silver-colored liquid seeping to his clothes.
  • In the Thunder Cats 2011 episode "Ramlak Rising", the Giant Squid/Man-Eating Plant Hybrid Monster the Ramlak is shown to have a strange blue ichor dripping from the severed ends of tentacles that Lion-O slices off when it first surfaces from the Sand Sea and attacks. When Lion-O strikes a mortal blow, its revealed that the monster's blood is, appropriately enough, water.
  • In Transformers: Prime, the life-force of Cybertronians is Energon and it varies from blue, to green, to a purple-pink, and it glows. But when the robots are injured it acts exactly like blood.

    Real Life 
  • Arthropods:
    • While certainly not aliens, most insects bleed light yellow (as mentioned above), some green; crustaceans bleed blue.
    • The most famous of these is the humble horseshoe crab, with blue copper-based blood. Scientists routinely extract blood from the crabs for all kinds of medical procedures & tests, then release the animals after they've regenerated their blood.
  • Mollusks tend to have blue blood.
  • Ditto spiders, whose hemocyanin gives them greenish blue blood.
  • There is a species of pen shell called Pinna squamosa. What makes it unique is that it is the only mollusc to use manganese to store oxygen, in a protein called pinnaglobin. As a result, it has brown blood.
  • Inverted with deep-sea tube worms, which have red blood like ours despite being from a taxonomic line in which iron-based blood pigment isn't expected.
  • The Prasinohaema genus of skinks, in contrast to every other healthy vertebrate, have green blood (as well as green muscles, bone, and everything else). This is caused by levels of biliverdin (bile pigment) in the blood that are so high they would kill any other vertebrate. The name, of course, means "green blood."
  • Due to having little to no hemoglobin, Antarctic icefish have translucent white blood.
  • Underwater, red blood appears green below a certain depth (red blood cells separate from the plasma, turning it yellow, which then combines with the blue tint of the water).
  • Eel blood, although it doesn't look "alien", is toxic to humans and other mammals. Beware eel sushi that looks too pink!
  • In humans...
    • Blood coughed up by accident victims with pierced lungs can be foamy and pink.
    • Sulphur can turn a person's blood green.
    • Carbon monoxide poisoning turns red blood an even brighter, unnatural-looking shade of red.
    • A convention of anatomical illustration is that deoxygenated blood vessels are depicted in blue on drawings and models. This sometimes leads people to the false conclusion that deoxygenated blood is blue; in fact, it's a reference to how the outsides of systemic veins, which carry this type of blood, look blue when seen through the paler shades of human skin.
    • While their actual blood doesn't look different, the bone marrow of a patient with advanced leukemia looks lighter in color than that of a healthy person, due to being overloaded with immature, non-functional white blood cells.
    • Methemoglobinemia is a genetic disorder that causes heightened levels of methemoglobin, which has a lower affinity for oxygen than hemoglobin, making the blood blue or brown. The most famous cases of methemoglobinemia are the "Blue Fugates", a Kentucky family known for their blue complexion.
    • Everyone has a small quantity of "blue blood cells" in their body thanks to the element gallium. Gallium can and will take the place of iron in the red blood cell, turning the hemoglobin blue.
  • Artificial blood:
    • The trope of artificial humans having white blood possibly comes from the early research into oxygen-carrying temporary blood replacements for emergency surgery. Some of these work using very different chemical processes to naturally occurring blood (of any colour) and look a lot like milk.
    • Other scientists are getting in on the fun too, it seems. They have created a oxygen-binding molecule called coboglobin, which is based on cobalt. Like human blood, it changes colors based on if it's oxygenated or not. If it is, then it's clear; if not, it turns amber yellow.
    • Perftoran/Perfukol/Fluozol-DA is blue. In the 1980s Soviet medics called it "blue blood". It's a water emulsion of fluororganic compound that can carry twice more oxygen than erythrocytes.
  • Invertebrates in the phylum Priapulida (also called "Penis Worms") actually have purple blood thanks to the presence of an organic molecule called haemerythrin.
  • Chickens of the Ayam Cemani breed, from Indonesia, have a type of extreme hypermelanism that makes every organ in their body - skin, feathers, legs, combs, meat, guts, bones, etc - pitch black. Their blood is the only non-black thing about them, and it's a very dark red compared to other birds'.


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