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2%% Image selected per Image Pickin' thread: https://tvtropes.org/pmwiki/posts.php?discussion=17064685260.38085200
3%% Please do not replace or remove without starting a new thread.
4%%
5[[quoteright:350:[[Film/EatenAlive1976 https://static.tvtropes.org/pmwiki/pub/images/eatenalive76blood.jpg]]]]
6%%
7->''Will all great Neptune's ocean wash this blood\
8Clean from my hand? No; this my hand will rather\
9The multitudinous seas incarnadine \
10Making the green one red.''
11-->-- '''Macbeth''', ''Theatre/{{Macbeth}}'', Act II; scene ii.
12
13One way to show LudicrousGibs without [[OverdrawnAtTheBloodBank breaking the laws of biology]] is to have a character die in a body of water, thus diluting the blood and causing it to billow out in clouds. As a bonus, this tends to look very [[FauxSymbolism symbolic... of nothing in particular]]. Perhaps it stems from the PrimalFear of [[BloodyHorror blood pouring out from wounds,]] and the illusion that there's more blood than there really is.
14
15Of course, if this happens in the open sea, the probability that someone will mention [[ThreateningShark sharks]], and their ability to smell [[MysteriousAnimalSenses a single red blood cell from 6 million light years away]], rapidly approaches 1.[[note]]Although experiments proved that sharks don't go for human blood. Fortunate, isn't it?[[/note]]
16
17Another common appearance is when ScrubbingOffTheTrauma, or a post-carnage ShowerOfAngst.
18
19In a case of RealityIsUnrealistic, real blood diluted in a large volume of water will actually turn it ''yellow'', the color of blood plasma (the liquid portion of the blood), not pink/red. However, the picture above is accurate in regards to relatively small amounts of water (or relatively large amounts of blood).
20
21A related phenomenon above the waterline is PinkMist. Can be a symptom of {{Gorn}}. A BathSuicide or DeadlyBath is likely to {{invoke|dTrope}} this. Common in ToiletHorror. Often overlaps with SymbolicSereneSubmersion.
22
23Compare BloodBath, where circumstances see blood ''substituted'' for water.
24
25----
26!!Examples
27[[foldercontrol]]
28
29[[folder:Anime & Manga]]
30* In the Yakuza arc of ''Manga/BlackLagoon'', the resident {{Jerkass}} gets his hands sliced off (with a ''[[KatanasAreJustBetter sword]]'', in a [[RuleOfCool modern-day setting]]) and is held underwater to bleed to death. He had it coming, though.
31* In an early filler episode of ''Manga/DGrayMan'', Kanda fights another swordsman in a pool of water and gets slashed across the chest. The last shot of the episode is of his blood spreading through the water around him.
32* The ending sequence of ''VisualNovel/HigurashiWhenTheyCry'' begins by showing blood which has just fallen into the water.
33* A RunningGag in ''Manga/OnePiece'' is Robin casually pointing out this trope whenever it seems as though someone might be killed particularly messily underwater, much to the discomfort of everyone in earshot.
34-->'''Robin:''' Well, he's not dead, or the water would be turning red.
35[[/folder]]
36
37[[folder:Fan Works]]
38* Defied in ''Fanfic/TheLegendOfTotalDramaIsland'' to set up a HopeSpot when a certain contestant dives into shark-infested waters and misses the safe zone. The {{cliffhanger}} arrives with said contestant still submerged, but the narrative explicitly states that there was no visible blood.
39* How Blackie Fuchs finds the corpse of [[spoiler:Nurse Raindew]] in ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' and ''WesternAnimation/MyLittlePonyTales'' {{Crossover}} ''Fanfic/MLPTrinity''.
40[[/folder]]
41
42[[folder:Films -- Live-Action]]
43* When the Triad boss is killed by falling glass in ''Film/{{Accident}}'', his blood pools on the sidewalk and spills into the water in the gutter.
44* In ''Film/AccidentMan'', Mike stabs [[spoiler:Jane the Ripper]], then pulls the sword out and shoves the body into a fountain. As it sinks under the water, blood fountains out of the mouth; staining the water red.
45* In ''Film/AprilShowers'', [[spoiler:Jason commits suicide in the bathtub.]]
46%%* Several times in ''Film/TheBeach''.
47* In ''Film/BlackSwan'', blood mysteriously drips into the bathtub over Nina's face as she submerges herself, right before one of the film's many [[JumpScare Jump Scares]]...but it might not have really happened.
48* In ''Film/{{Blastfighter}}'', a flashback to the murder of Tiger's wife shows her killer holding her head underwater in a bathtub, and then stabbing her in the neck with an icepick so he blood gushes out into the water.
49* The raft massacre in ''Film/TheBurning'' ends with blood dripping off the murdered campers into the river.
50* In the Film/HammerHorror movie ''Film/{{Crescendo}}'', Lillianne the maid is SkinnyDipping in the swimming pool when the killer stabs her. She is shown floating face down with a cloud of red water surrounding her [[DropDeadGorgeous nude]] [[FanDisservice body]].
51* ''Film/DeadAgainInTombstone'': After being riddled with bullets by Boomer's gang, Guerrero collapses in the river. The water is shown washing over him and flowing out red the other side.
52* ''Film/DeadtimeStoriesVolume1'': In "House Call", when the two missing hikers are discussed, a cut shows their naked bodies lying in the snow. One of them lying on the edge of a small waterfall, and the water in the stream is flowing through the body and spraying out red on the other side.
53* In ''Film/DeathBecomesHer'', the water in the pool Helen Sharp falls into turns red with blood when her rival Madeline Ashton blows a hole in her stomach with a shotgun.
54* The teenage Antichrist's baby baptism in the 1981 horror film ''Film/FearNoEvil'' turns the water into blood the instant he is immersed.
55* In ''Film/Firestorm1998'', Davis cuts himself shaving and a drop of blood falls into the running water in the sink. A few moments later, Shaye stabs him in the neck with a SinisterShiv, and the camera cuts to stream of blood running down the sink, mixing with the water, and washing down the plughole.
56* In ''Fool's Gold'', an enemy scuba diver is sucked into a current in an underground cave that feeds a geyser. When the geyser erupts, it's red with his blood.
57* The opening sequence of ''Film/TheGentlemen'' ends with a gunshot that sprays blood into a glass of beer; slowly staining the beer a darker colour. This then bleeds (literally) into the opening credits.
58* Discussed towards the end of ''Film/GetHimToTheGreek'', when the [[TradeYourPassionForGlory burned out]] and increasingly suicidal rock star [[BritishRockStar Aldous Snow]] breaks his arm diving into a pool from a hotel roof, then has a tearful conversation with Aaron about how destructive his [[HookersAndBlow lifestyle]] is and that it's not working for him. All the while astute viewers may notice that in the background the pool is getting increasingly bloody. Aaron mentions it at the end of their conversation and asks Aldous if he's OK. Aldous shrugs it off, saying that a little blood looks like much more than it really is in water.
59* ''Film/GhostShip'': When [[spoiler:Munder]] is killed and his body sucked into the pumps that are pumping out the ship, the water in the clear hose turns pink.
60* In ''Film/TheGodfatherPartII'', a character commits BathSuicide, Roman fashion. You only see the aftermath, including liberal helpings of blood on the walls for good measure.
61* Occurs in the film ''Film/GodzillaVsMechagodzilla''. In the first battle between Godzilla and his robot counterpart, Godzilla is shot several times by Mechagodzilla and falls into the ocean. The ocean turns red with Godzilla's blood but, [[spoiler:he gets better.]]
62* ''Film/TheGoldenVoyageOfSinbad''. After Prince Koura is mortally wounded while in the Fountain of Destiny, the Fountain's waters turn red to symbolize his blood loss.
63* Several movie versions of ''Literature/TheGreatGatsby'' do this with [[spoiler:Gatsby's death in his swimming pool.]]
64* ''Film/TheHitList'': Or milk, in this case. After Gates is shot in his kitchen, his blood mingles with milk spilled on the floor.
65* Pretty much every death in ''Film/{{Jaws}}'', for [[ThreateningShark obvious reasons]].
66* In ''Film/JuliaX'', When Julia is relaxing in the bath, she is alerted to The Stranger's presence by his blood dripping into the water.
67* ''Film/{{Jungle}}'': When Yossi is tossed into the river after the raft smashes, he hits his head on a rock and blood flowing out surrounds his head like a halo.
68* The Crazy 88 fight in ''Film/KillBill'' ends up with several of the {{mooks}}, and Johnny Mo, lying dead in the restaurant's now-crimson ornamental water features.
69* In ''Film/{{Kristy}}'', the gang member Justine kills in the pool continues to emit clouds of red blood into the water in subsequent shots.
70* Blood flowing into water is something of a motif in ''Film/LegendOfTheBlackScorpion''. At one point the emperor dropping a red grape into water evokes earlier examples of actual blood in water and signals that an execution is coming.
71* Dieter Stark's death at the hands (claws?)--more likely teeth--of the compys in ''Film/TheLostWorldJurassicPark''. Also, Robert Burke's death has parts of this, as you see his blood flowing down the waterfall.
72* In ''Film/TheManWhoKilledDonQuixote'', Toby washes out Quixote's self-inflicted wounds in a creek, staining the clear water red.
73* ''Film/MirrorMirror1990'': After [[DeadlyBath drowning Ron in the bath]], Nikki's doppelganger bites a chunk of flesh out his chin. The wound turns the water in the tub pink.
74* ''Film/MonsterParty'': Elliot is shot through the head and plunges into the swimming pool. There is a shot from the bottom of the pool of his body descending towards the camera, with the blood blossoming out behind him like a halo.
75* In ''Film/TheNakedWitch'', the witch stabs the miller and pushes his body into the stream; staining the water red with his blood.
76* In ''Film/NextOfKin1982'', Linda finds [[spoiler:Connie and Dr. Barton]] dead, having been stabbed to death, in a bloody bathtub. Shortly before that, the water in a fountain turns red and Linda comes across her friend Carol's dead body.
77* ''Film/NightAfterNightAfterNight'': In a scene very reminiscent of ''Film/{{Psycho}}'', Jenny's blood mixes with the water in her shower when she is stabbed to death.
78* ''Film/NightOfTheStrangler'': After drowning Denise in a bathtub, the killer slits her wrists to make it look like a suicide, turning the bathwater red.
79* ''Film/TheOddAngryShot'': Bung is machine-gunned and falls over the side of a bridge. When his squad mates retrieve his body, his blood is staining the water around him red.
80* The finale of ''Film/TheOmegaMan'', where Charlton Heston dies in a [[CrucifiedHeroShot Christ-like pose]] in a blood-filled fountain. His blood is also the world's salvation, to really push the symbolism.
81* ''Film/TheOutsiders'', blood fills up the fountain.
82%%* All ''Film/{{Piranha}}'' movies.
83* When a slasher movie has a name like ''Film/ThePool'', it is to be expected. A specific example would be the very first death, which is followed by the victim's corpse being dropped into a pool, spreading blood in the water.
84* ''Film/{{Psycho}}'', the shower scene ends with bloodied water going down the drain. It was made possible with chocolate syrup. An inversion of this is also why the movie is in [[DeliberatelyMonochrome Black and White]], since Hitchcock felt that "pink wasn't scary".[[note]] Well, he definitely ''said'' that, but it was also because it was much cheaper to shoot it that way - the project was considered likely to be a flop, right up until it became a smash hit.[[/note]]
85** ''Psycho II'' sees the toilet in the Bates house overflow with blood [[spoiler:after the killer jams a bloody towel into it, presumably one used to clean up their handiwork]].
86* In Creator/TheBBC's "Hollow Crown" adaptation of ''Theatre/RichardII'', Bolingbroke beheads two of Richard's supporters on the edge of a lake, such that their heads fall directly into the water.
87* In the American version of ''Film/TheRing'', a horse being transported on a ferry gets loose, jumps overboard and gets washed under the boat. A few seconds later, the boat's wake turns bright red.
88* [[spoiler:Connor Rooney]] is shot in the bath in ''Film/RoadToPerdition''.
89%%* The finale of ''Film/RushHour''.
90* ''Film/SavingPrivateRyan'' has many soldiers die before reaching shore as bullets hit them below the waterline. By the end of the scene, the entire surf is red.
91* [[spoiler:Tony Montana]]'s death at the end of ''Film/Scarface1983''.
92* The opening credits to ''Film/{{Skyfall}}'' feature this heavily, after the ActionPrologue ends with Bond [[spoiler:being shot and falling into a river.]]
93* A toilet randomly overflows with blood in ''Film/SlaughterHigh''. (Presumably it was another of Marty's 'pranks'.)
94* In ''Film/AStudyInTerror'', Polly Nichols is shoved into a horse trough and held under before being stabbed. A shot from under the water shows the blood floating upwards to the surface of the trough.
95* The end of ''Film/SympathyForMrVengeance'' has one of the characters killing another in a shallow river and then drag him ashore.
96* ''Film/TigerHouse'': Kelly shoots one of the gang with a crossbow and then tackles him into the swimming pool. Blood from his wound slowly spills into the water.
97* ''Film/{{Transit}}'': When the wounded Nate slides off the jetty into the bayou, a pool of oily looking blood forms on the surface of the murky water.
98* In ''Film/TheWomanHunt'', the body of [[spoiler:Spyros]] falls into the pool where Tony and [=McGee=] are SkinnyDipping, and the blood blossom out in the water around it (although the 'blood' [[SpecialEffectsFailure seems to have the consistency of paint]]).
99[[/folder]]
100
101[[folder:Gamebooks]]
102* In Book 10 of the ''Literature/LoneWolf'' series, ''The Dungeons of Torgar'', one of the paths to the end is to travel through the deadly [[IDontLikeTheSoundOfThatPlace Hellswamp]] with the partisan leader Sebb Jarel. Eventually, Lone Wolf and Jarel are ambushed by the dreaded Ciquali (frogmen) and Jarel is dragged underwater.
103-->''He surfaces, sword in hand, but is pulled under again and this time he does not reappear. A trail of bubbles and a patch of red water drifting with the current are all there is to mark the grave of Sebb Jarel.''
104* In ''Literature/TheTunnelsOfFear'', if you choose the wrong pool to wade through, you are attacked by flesh-eating piranhas, and the pool turns red with your blood.
105[[/folder]]
106
107[[folder:Literature]]
108* At the Cornucopia in ''[[Literature/TheHungerGames Catching Fire]]'', after the [[spoiler: Victor]] bloodbath.
109* [[spoiler: Gatsby]]'s death is described that way in ''Literature/TheGreatGatsby''.
110* ''Literature/LeftBehind'':
111** As in the ''Literature/BookOfRevelation'', the seas and springs of water turn to blood due to God's judgments. However, during the Bowl Judgments in the series, believers in Christ are miraculously able to get fresh water from the bloody springs.
112** Earlier in the series, the Two Witnesses are able to turn water to blood and vice versa, which squicks Carpathia out during his failed speech at Teddy Kollek Stadium when his mouth starts to run dry and he asks for water.
113** Chaim Rosenzweig as Micah the prophet is also given this ability.
114* In the ''Literature/LordPeterWimsey'' novel ''Have His Carcase'', the victim is murdered on a rock on the seashore, and when Harriet finds the body his blood has run into a nearby rock pool and turned the water red.
115* A couple of times in ''Literature/{{Neverwhere}}'', for example when Door's brother is killed and left in their swimming pool.
116* [[spoiler: Dewey Denounment]] dies in a pond in the ''Literature/ASeriesOfUnfortunateEvents'' books.
117* ''Literature/WarriorCats'':
118** [[spoiler:Hawkfrost]]'s death; he stumbles into the shallows of a lake, fulfilling a prophecy as his blood mingles with the water: ''Before there is peace, blood will spill blood, and the lake will run red.''
119** To a lesser extent, [[spoiler:Ashfur]]'s death; he falls into a stream after being murdered.
120[[/folder]]
121
122[[folder:Live-Action TV]]
123* ''Series/AgathaRaisin'': In "Agatha and the Wellspring of Death", when the second VictimOfTheWeek is found dead and propped up against the eponymous wellspring, there is a shot of her blood slowly dripping off her and into the spring where it dilutes through the water.
124* ''Series/TheBorgias'': [[spoiler: Micheletto's failed assassination of Cardinal della Rovere in Naples]] results in this, [[spoiler: as he garrotes an unfortunate mook who attacks him after being recognised by the target.]]
125* A flashback in ''Series/BreakingBad'' shows [[spoiler:Gus' beloved partner Max being executed by Hector Salamanca]] beside a swimming pool, with Gus ForcedToWatch in closeup as the last of his lifeblood drains out into the water.
126* In an opening to an episode of ''Series/TheCloser'', there's a blink-and-you-miss-it shot of blood splashing into a swimming pool.
127* ''Series/CSICyber'': In "Legacy", a 13 year old hacker is shot and falls into a swimming pool. Red is shown ballooning out from around him as he sinks into the water.
128* ''Series/{{Dexter}}'': Bathtub deaths form a major part of the Trinity Killer's pattern. This is later revealed to be due to a youth trauma in which the young Arthur Mitchell witnessed his sister's accidental death in a shower. Startled by Arthur's presence, she slipped and smashed the shower door, shards of which cut her femoral artery and caused her to bleed out in the water.
129* ''Series/TheDoctorBlakeMysteries'': In "Family Portrait", Edward Tyneman is found lying in a fountain with his throat slashed. The blood has stained the water red and, because of the action of the fountain, the stain has spread to all levels of the fountain.
130* In the first episode of the ''Series/MelrosePlace'' remake, [[spoiler:Sydney Andrews]] is found murdered in the pool of the apartment complex, with more than a little blood in the water around her.
131* ''Series/MNidsomerMurders'': In "[[Recap/MidsomerMurdersS5E2 Market for Murder]]", Ginny Sharp receives a blow to the head in her pool. The police find her with clouds of red in the pool.
132* In one episode of ''Series/{{NCIS}}'', a couple plans to have a BDSM-style night when the woman goes in to take a shower. Cue the man rushing in to her screams when she sees the showerhead spraying blood due to a body in the water tank.
133* The fifth season opening of ''Series/{{Supernatural}}''.
134* This trope is rather visible in the first season finale of ''Series/TerminatorTheSarahConnorChronicles'', when Cromartie disposes of an entire SWAT team into a swimming pool.
135* ''Series/{{Vera}}'': In "Silent Voices", the VictimOfTheWeek is murdered while swimming in a stream. There is a shot of blood from her head wound flowing into the water and being diluted.
136[[/folder]]
137
138[[folder:Music]]
139* And the Band Played Waltzing Matilda by ''Music/ThePogues'' has this.
140-->''How well I remember that terrible day''\
141''When the blood stained the sand and the water''
142* ''Music/FlorenceAndTheMachine's'' "Rabbit Heart" refers to this in the context of a HumanSacrifice.
143* ''Music/{{Love|Band}}'s'' "A House Is Not a Motel" from ''Music/ForeverChanges'':
144-->''And the water's turned to blood, and if''\
145''You don't think so, go turn on your tub.''
146* In the music video of ''Music/{{Manowar}}'s'' "Gloves of Metal" this happens when the guy who is hit by Joe de Majo's morning star drops dead into a brook.
147* The swimming pool scene in the video to ''Music/PinkFloyd's'' "Music/TheWall".
148[[/folder]]
149
150[[folder:Myths and Religion]]
151* Literature/TheBible has the Nile turning to blood. While the blood wasn't from anyone dying, several movie versions have the blood fanning out from one source (usually Moses), giving off this effect as the transformation ensues.
152[[/folder]]
153
154[[folder:Poetry]]
155* "Literature/{{Krakumal}}": As Ragnar recalls his viking career, the image of blood mixing with water is evoked repeatedly. In stanza #3 "wound-sweat [i.e., blood] swelled the ocean", stanza #4 tells a "river was all reddened / with hot running wound-splash", and stanza #19 relates that "Irish blood was blended / with brine, at the slaughter."
156[[/folder]]
157
158[[folder:Roleplay]]
159* In ''Roleplay/DawnOfANewAgeOldportBlues'', a fight breaks out between a group of students while the sprinklers in the high school are going off. Carlie is shot and Devin is stabbed, their bodies falling to the ground and the narration describing how their blood pools and spreads in the water left by the sprinklers.
160[[/folder]]
161
162[[folder:Tabletop Games]]
163* In the Stormwrack supplement for ''TabletopGame/DungeonsAndDragons'', spilling blood underwater attracts sharks. It also inverts it with a spell that turns blood to seawater.
164[[/folder]]
165
166[[folder:Theatre]]
167* Theatre/{{Macbeth}}'s parallel of his wife's more famous "Out damned spot" soliloquy discusses the trope; see the page quote. Of course, he's talking metaphorically; saying that any attempt to wash out the blood will only serve to stain the water {{foreshadow|ing}}s how [[CrimeAfterCrime every attempt to cover up his crime will result in yet more blood]].
168[[/folder]]
169
170[[folder:Video Games]]
171* In ''VideoGame/AssassinsCreedI'', Altaïr's first target, Tamir, [[KickTheDog stabs a man to death]] and lets the body fall into a shallow pool of water which rapidly becomes red with blood.
172* Lord Woo Fak Fak, the giant anglerfish boss in ''VideoGame/BanjoTooie'', billows blood into the water whenever he's hit in one of his [[NoticeThis boils]].
173* In ''VideoGame/BrothersATaleOfTwoSons'', the brothers come upon a bloody battleground of giants. The battle apparently just happened, because the giants' blood is still flowing into nearby streams, and even makes a waterfall run red. The brothers have to wade through the water to progress and make sounds of disgust as they do so.
174* The ''VideoGame/DeathInTheWater'' series is set entirely underwater. Nail an onscreen enemy (sharks, sirens, octopus, etc) with your HarpoonGun and you'll see a fine cloud of blood spreading out where you hit, although the blood cloud dissolves after a few seconds.
175* The menu screen for ''VideoGame/DeadIsland'' has this [[https://www.youtube.com/watch?v=rBIyJTHfdPE constantly going on as a background]]. It's actually quite pretty, rather like a lava lamp. Made of blood.
176* The second time [[MonsterClown Jester]] pops up in ''VideoGame/DevilMayCry3DantesAwakening'', he causes a nearby stone fountain (adorned with seemingly decorative gargoyles) to overflow with blood, awakening the now demonic [[OurGargoylesRock Blood-goyles]] to attack Dante, who isn't very intimidated.
177* In an old build of ''VideoGame/DwarfFortress'', a single spattering of blood would turn an entire body of water red. Even the ocean. It's still played straight; blood like any other contaminant lingers where it's washed off, and fills a tile of standing water or flows downstream with running water.
178* Whenever the shark kills someone underwater in ''VideoGame/JawsUnleashed'' during the cutscenes, it turns a big area in the water blood red.
179* ''VideoGame/MadWorld'': In the Courtyard, there is a fountain in the center of the first part of the level. Impaling people on the spiky parts cause that part of the fountain to start spewing blood in the place of water. One of the Deathwatch Challenges is actually nailing a body on every spike on the fountain.
180* A couple of ''Franchise/MortalKombat'' games feature stage fatalities which result in the loser being thrown into water. This being ''Mortal Kombat'', it's no surprise that a swarm of nasty creatures ([[PiranhaProblem possibly piranha]]) happens to be lingering just below the surface, quickly reducing the victim to a bloody cloud in the water. It's probably saying something that this is one of the tamest and least graphic deaths in the series.
181* One case in ''VisualNovel/PhoenixWrightAceAttorneySpiritOfJustice'' involves a priest dying in a shallow pool, which coats the crystal clear water a grisly crimson, which you can observe in the crime scene photo.
182* One of [[MakingASplash Sogetsu Kazama's]] supers in the 2019 ''VideoGame/SamuraiShodown'' game consists of him trapping his opponent in a floating water sphere before throwing two water shuriken at it, slicing up his hapless victim and turning the water a charming shade of red, before finishing them off by throwing a single drop at the sphere and making it explode. See it [[https://www.youtube.com/watch?v=gkBbdkiEMU0 here]].
183* Living creatures that die underwater in ''VideoGame/TombRaiderIII'' will release a blossoming cloud of bright red blood. Particularly distressing to witness if Lara is attacked by a school of piranhas.
184* This is part of the game mechanics in ''VideoGame/{{Ultrakill}}''. Your character heals by being covered in the blood of its victims. If you kill an enemy underwater, it creates a red pool that lasts longer (meaning you can kill a target from a distance and then move into the blood), but doesn't heal as much (because the blood is diluted).
185* In ''VideoGame/WorldOfWarcraft'', if you kill a beast in the Borean Tundra, you find yourself covered with blood (which will piss off the local AnimalWrongsGroup). You can wash it off by swimming in water, which will leave behind a "pool of blood." Repeatable fishing quests require you to do this deliberately because the blood attracts a unique type of fish.
186[[/folder]]
187
188[[folder:Webcomics]]
189* ''Webcomic/{{Unsounded}}'': In the aftermath of tearing through the Deadly Nevergreen and its occupants the Selver swims away in the River Jarla, trailing and gathering gory detritus.
190[[/folder]]
191
192[[folder:Western Animation]]
193* The ''WesternAnimation/LoveDeathAndRobots'' short "Jibaro" features a siren who lives in a lake and drives a troop of knights to madness with her song. The lake turns pink from them hacking each other to pieces before all perishing. Then it's put up to eleven after the siren herself apparently dies: all the rivers connected to the lake [[RiversOfBlood turn a deep, crimson red]]. ''Upstream''.
194[[/folder]]
195
196[[folder:Real Life]]
197* TruthInTelevision in that people who are sensitive to seeing blood will often do fine until they go to wash the wound and see the red spatters in the sink. The same can apply to people who don't feel as much pain from minor cuts until they see the injury.
198* Similarly, cutting yourself in a swimming pool can be a harrowing experience.
199* Or having your gums bleed while brushing your teeth. Sink looks like a murder scene. The worst is after getting your wisdom teeth removed, the holes will often bleed profusely, resulting in spitting huge mouthfuls of blood into the sink.
200* Or getting your period unexpectedly in the tub/pool/ocean/what-have-you. Even going to the bathroom while you're on it can produce this effect.
201* When doctors are treating people who have cut themselves badly and ask them to estimate how much blood they've lost, they take this trope into account, knowing that people who have bled into water are likely to grossly overestimate.
202* Hemorrhoids also have this effect. Toilet water dilutes the blood in stool, making it appear that the patient has lost much more blood than they actually have.
203* Not actually blood, but; Red Tide, a harmful algal bloom that turns water red and can kill fish and other sea-dwelling life. It's been suggested that this inspired the Nile turning to blood in the Bible, as mentioned above.
204* When the carbon dioxide in [[https://en.wikipedia.org/wiki/Lake_Nyos_disaster Lake Nyos suddenly erupted from the water and killed nearly 1800 people]], the disturbed iron on the lake bottom turned the water's surface red.
205* Nicking yourself while shaving ''in the shower'' (more frequent for women than men) means that the blood takes much longer to clot than usual. "Ow! I'll need a bandaid" will rapidly become "HOLY CRAP WHY IS THE BATHTUB RED?!"
206* For aquatic mammals, this trope is TruthInTelevision when they get injured to the point of bleeding, since - especially in scenarios where predators are involved - a great deal of blood might be shed into water over a short amount of time.
207** There was an incident at Ride/SeaWorld where an orca attacked another orca during a show. The pictures are horrifying.
208** ''Film/TheCove'', a documentary about secret dolphin killing in a town in Japan. At one point there's an underwater camera, which seems like it serves no purpose other than to look into the very clear water at the bottom of the cove. A few seconds later, ''the entire view of the camera turns a bright, opaque red from the top down due to the quantity of blood in the water''.
209* When the toilet gets clogged as a result of someone flushing their menstrual products down the toilet instead of properly throwing them away.
210[[/folder]]
211

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