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From left to right: a Protoceratops, an Allosaurus, a Ceratosaurus, an Edmontonia, a Megalosaurus and a Hypsilophodon, and they are all related, somehow.

"Mama had a chicken
Mama had a cow
Dad was proud,
He didn't care how!"

In works featuring Interspecies Romance, the characters sometimes manage to reproduce. In more "realistic" settings (including real-life), the offspring would be some sort of hybrid. In less realistic works, Gender Equals Breed might be in effect.

However... in certain works, the species of the child doesn't seem to have anything to do with the species of the parents whatsoever. This is most likely to occur in video games, cartoons, and works aimed towards a younger audience or basically any work where humor/symbolism/weirdness is favored over logic, but there are exceptions.

Examples where parents are the same species/breed still count if the child is not. The definition of "species" could be very liberal, but if the child's appearance or powers are explained by infidelity, adoption or shapeshifting in any form, it doesn't count.

Due to the trope's nature, a lot of artistic license is involved. More so for the Mythology entries which were made by ancient people before sufficient scientific understanding of how such things work.

When one (or both) of the parents don't like the desired outcome of this, see That Thing Is Not My Child!.

About as common in Furry Fandom as Interspecies Romance — that is, very. Partially because furries who are related in Real Life don't necessarily choose the same species for their fursonas.

If Interspecies Romance is very common in the setting, it can be hand waved with latent genes. If Alice the Aardvark and Bob the Bobcat both have a wolf grandparent, it kind of makes sense that their child could be more wolf than anything else, even if neither of them have noticeable lupine traits... right?

This trope is often the result of Hot Skitty-on-Wailord Action, where two completely different species that would be incompatible in real life are somehow able to breed and have children together.

Compare Hollywood Genetics. Contrast All Genes Are Codominant and Patchwork Kids, wherein offspring possess, respectively, abilities and physical attributes that are basically an extreme combination of both parents. Also see Either/Or Offspring, where the offspring of a different-species couple inherit one of the parents' species, and Dominant Species Genes, where offspring always inherit the same parent's species.

There are no Real Life examples.


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    Anime & Manga 
  • The Netflix reboot of Aggretsuko provides a strange implied example. Every onscreen couple that has children is same-species, with children to match. However, when Retsuko and Tadano discuss the prospect of having children, it's never brought up that he's a donkey and she's a red panda. It's weird, considering the TBS version's propensity for biology gags.
  • Thanks to their unique physiology based on the creatures the Queen eats, the offspring of a Chimera Ant Queen from Hunter × Hunter are Mix-and-Match Critters that are completely different from their mother. This is highlighted after the Queen prematurely gives birth to the new King and is in a critical condition. Despite some of her remaining offspring offering to donate their body parts to help her recover, they can't due to them and the Queen being completely different and incompatible organisms.
  • One Piece:
    • Part of the unique reproduction of Fishmen and Merfolk is this. Due to strong dormant genes inherited from their ancestors, Fishmen and Merfolk families can consist of different types of fish hybrids. A prime example of this is the royal Neptune family. The king is a giant-sized coelacanth merman, the queen is a normal-sized goldfish mermaid, their sons are normal-sized dogfish, oarfish, and sunfish mermen, and their daughter is a giant-sized smelt-whiting mermaid.
    • Minks follow a similar reproduction rule, albeit with furry mammals instead.

    Comic Books 
  • Marvel Universe:
    • In X-Men, mutants are technically the same species, but the appearance of a child (especially those with less human appearances like blue fur, tails, bird wings and so on) seems to have little to do with the appearance of a parent (not to mention their powers).
    • One of the more consequential cases of this is Thanos of Titan, a mutant Eternal, whose very existence discredits the "current" in-universe "theory" of super-powered "mutants". He looks like a Deviant, which Eternals were created as foils too. On that route, while Deviants can look like each other, they never look like their parents. This was done specifically to see if Deviants would still love their children (they don't).
    • In the Spider-Ham universe, Quacksilver is a duck and his sister, Scarlet Pooch, is a dog. A newspaper gossip column specifically asks how this works. We're not told if their father is Nagneto or Magsquito, as was the case for mainstream Quicksilver and Scarlet Witch at the time, but we're not told otherwise, either.

    Comic Strips 
  • Rosalind and Rupert's son Gregor in Safe Havens is more of a human/plant hybrid than a human, thanks to some residual effects from Samantha's genetic research. Initially, it was thought he had daffodil DNA from the time Rosalind was stuck in a daffodil's body (long story), but recent events showed that he actually got Venus flytrap DNA from the time she and Rupert turned into them for some fun.
  • The old Marvel UK anthology Marvel Bumper Comic had an Anthropomorphic Animal Adaptation of EastEnders called "Halibut Square". In this strip, Pauline Fowler was a chicken (mother hen and pun on "fowl"), Arthur Fowler was a mouse (meekness, as a [literal] Henpecked Husband), and their daughter Michelle was a snail (pun on "shell"). (Michelle's baby Vicki, however, is a snail/rat Patchwork Kid, despite which nobody knows who the father is.)

    Fan Works 

    Films — Animation 
  • Kung Fu Panda: Zigzagged in the first movie, in which nobody seems to question that Po, a panda, is the son of a goose. Late in the first movie, Po's dad, after Po says sometimes he can't believe he's really his son, starts to tell him a secret which is teased to be that he's adopted, only to instead tell him the secret ingredient to his Secret Ingredient Soup. Then subverted in the second movie when we find out that Po's adopted.
    Po: I just found out that my dad isn't really my dad.
    Tigress: ...your dad?
    [Po nods]
    Tigress: The goose.
    [Po nods again]
    Tigress: [no change of tone or expression whatsoever] ...That must have been quite a shock.
    Po: [sheepishly realizing the obvious] ...Yeah.
  • Monsters, Inc.: An unusual example in this case. Monsters are one species, but have extremely varied appearances, and it's been shown that this extends to families. While some relatives have Strong Family Resemblance (to the point of Identical Grandson), others...not so much. In the original movie when Boo was disguised as a fleshy, tentacle limbed monsters with eyes on stalks, those who fell for the ruse kept assuming she was the daughter of the mammalian looking Sulley. In the the prequel we learn that Mike has a cousin who's fuzzy and blue (even though his direct family members all look identical to Mike), and in the spin-off TV show, main character Tylor only vaguely resembles his parents at best. In the second season, we see that Jonny Worthington III and Claire (both from University), have a son whose lower body resembles an oversized armored insect even though neither of them have features like that (their daughter looks like Claire with horns, but even then she's a cyclops even though both of her parents have multiple eyes) and Roger Rogers is the secret son of Henry J. Waternoose, and is colorful, fluffy, and has no resemblance to his father outside of both of them have Extra Eyes.

  • In Arabian Nights, there's a story about two sisters who are jealous of their sister, who gets to marry the Sultan. They ask to be her midwives whenever she gives birth, and whenever she gives birth, they exchange the baby with an animal and put the baby in a basket to send it downstream, pretending this happens every time.
  • In Lyn Abbey's Jerlayne, an elf mating with an elf will result in a random variety of fantasy beings including dwarves, banshees and dragons. The titular character's first child was a Rusalka. The only way to guarantee an elf being born is for a female elf to go to the human dimension and mate with a man who has some elf ancestry.
  • The eponymous monsters in Scott Sigler's Nocturnal. They come in several varieties, but the soldier caste are typically superhuman monsters with inexplicably bestial features, given the appearance of 'Mommy,' her human 'grooms' and any potential 'Kings.'
  • Possily the Firstborn from the October Daye series. Although they're all descended from at least one of three parents (Oberon, Maeve and Titania), each Firstborn produces their own different faerie race(s). When two Firstborn mate, they produce a different race altogether.
  • The eponymous Stuart Little is a sapient mouse born to human parents, which is treated as more of a novelty than a freak incident. The movie changes this to Interspecies Adoption.

    Live-Action TV 
  • The page image comes from Dinosaurs where, as stated, a family all related by blood consists of a Protoceratops, an Allosaurus, a Ceratosaurus, an Edmontonia, a Megalosaurus, and a Hypsilophodon. Note that some of these species were separated by millions of years of evolution too — the Edmontonia and the Ceratosaurus were separated by about 80 million years. And despite this the show still dealt with themes of racism, albeit by treating quadrupeds and bipeds as different rather than going by the species of characters, and herbivores were treated as an analogue of homosexuality rather than race.
  • Eddie Munster from The Munsters is the werewolf son of Herman and Lily Munster, who are a Frankenstein's Monster and a vampiress respectively. Lily's father "Grandpa Munster" is also a vampire, but her niece Marilyn is a normal human girl.

    Myths & Religion 
  • Classical Mythology: This happens all the time. For example, Gaea, the Earth, mated with Ouranos, the sky, at the beginning of the universe. Their first three sons were hundred-armed, fifty-headed humanoids; the next three were Cyclopes; and the last six were Titans. Why? Who knows?
    • The offspring of the monstrous Typhon and Echidna are probably the best-known creatures of this trope. To name a few, there is the three-headed dog Cerberus, the multi-headed Hydra, the Nemean Lion, the Erymantean Boar, the Chimera and many others. Then again, Typhon is sometimes said to have heads of many different animals, so maybe they got the genes from there.
    • Echidna's own parents were Phorcys and Ceto, two gods who randomly had many bizarre or monstrous children, including Medusa, Euryale, and Stheno.
    • Pegasus and his brother Chrysaor, who is sometimes depicted as either a giant or a winged boar, are the sons of the gorgon Medusa and the god Poseidon. The two of them were birthed when their mother was decapitated. Additionally, Chrysaor sired the three-torsoed Geryon with the naiad Callirrhoe.
    • In The Odyssey, Odysseus meets Polyphemos, a Cyclops son of Poseidon. So Poseidon hooked up with a lady Cyclops? No; Polyphemos' mom was a sea-nymph named Thoosa, who may have looked like a (possibly giant) mermaid. For some reason their kid was just giant and one-eyed.
  • Egyptian Mythology has Osiris's family to note. Osiris's grandfather (or great grandfather depending on sources) Ra was a God that was depicted as a number of things. The most usual and famous is a hawk-headed man but others include a ram-headed man, a full ram, a beetle, a phoenix, and a serpent to name a few. Osiris's birth parents were Geb and Nut, the Earth God and Sky Goddess respectively. In some interpretations, Geb is depicted with the head of a snake or a goose, while Nut is depicted likewise in some interpretations as a cow. Osiris is overall human in appearance, but his brother Set has the head of a desert animal, which some speculate to be an aardvark. Osiris's son by his wife Isis is the falcon-headed Horus. Meanwhile the jackal-headed god Anubis is related to at least one of these people, though sources vary on whom.
  • Norse Mythology: Both the Fenris Wolf and the Midgård Serpent are the offspring of Loki and female giant Angerboda. The fact that their third child, Hel, was actually humanoidnote  only adds to the confusion.
  • In Celtic Mythology, the great sow Henwen gave birth to the monstrous cat Cath Pulag.

    Tabletop Games 
  • Dungeons & Dragons:
    • In 1st Edition Advanced Dungeons & Dragons, the mating of orcs with ogres produces ogrillons: humanoids covered in bony nodules not found in either of their parent races.
    • In the Forgotten Realms setting, hags are an all-female race who reproduce by raping human men. Only female children are hags; males are brutish hagspawn.
    • The offspring of a half-Outsider (extraplanar being + mortal) and a mortal is called a Planetouched. There are about two dozen known types depending on the exact combination of parents. Moreover, the offspring of a planetouched and another humanoid will be either the same planetouched race of the humanoid parent's race, and thereafter any descendants of that humanoid child will have a chance of being the same type of planetouched as their ancestor, regardless of how many generations removed they are from them.
  • Hc Svnt Dracones:
    • Vector species were designed to interbreed but to prevent homogenization they have "Mutt Reduction Protocols" built into their genes that usually cause the progeny of an interspecies couple to be one parents' species or the other, with a roughly equal chance of either. Though sometimes a grandparent's species pops up instead. In very rare cases, the Mutt Reduction fails, and you get a sterile Hybrid.
    • On the other hand Cogs/Vector couples always have kids that are more like the mother, as it's simpler to translate what the father uses for "design codes" into what the mother uses than vice-versa.
  • Shadowrun:
    • The genetics of metatype are unpredictable. When two people of different metatypes reproduce, the offspring is most likely to be human, but could potentially be of either parent's metatype or a third type.
    • In a parents-same, offspring-different example, about one in four daughters produced by pairs of giants (a troll subtype) will be born human.
    • The original emergence of elves and dwarves by UGE (Unexplained Genetic Expression) was a mass occurrence of this trope, as human couples around the globe produced metahuman offspring.

    Video Games 
  • Garfield Thelonius Remmington III in Arcanum comes from pure human stock, but by some freak accident of birth he was born with an appearance indistinguishable from an orc. He makes his living working as a freakshow attraction, "Gar the World's Smartest Orc", impressing visitors with his knowledge of politics, mathematics and tea.
  • In The Elder Scrolls, the Khajiit are comprised of at least 17 known sub-species. The offspring of a Khajiiti pairing has nothing to do with the sub-species of its parents, but rather, the phases of the moon under which it is born. In a case of Hot Skitty-on-Wailord Action, these subspecies can range from the size of housecats, through various forms of humanoid cat-men, to elephant-sized tiger-men who can be ridden as Beasts of Battle.
  • Final Fantasy Legend II: The Player Character's parents will always be humans regardless of what species you choose at the start, while the other party members all have a single monster parent, none of which are part of the starting monster choices, though this is less significant given the player-monsters can become any other kind of monster.
  • Kit from Fortnite: Battle Royale is a sapient but non-anthro cat. His (seemingly currently divorced) parents are Meowscles, a very anthropomorphic cat-man, and Lynx, who is a human woman who wears cat-themed outfits.
  • In Little Big Adventure 2, there is a family of three where one is a Grobo (anthropomorphic elephant with giant head), one is a Rabbibunny (tall, thin, rabbit-like creature) and one is a Sphero (basically heads with short arms and legs).
  • Bon Bonne in Mega Man Legends. While his apparently human siblings refer to him as their baby brother, he doesn't seem to have a single organic part. Granted, he could be a robot their parents built (thus making him their "brother"), but they seem to live in a world where no one ever makes any distinction between robots and humans whatsoever.
  • The breeding mechanics in Palworld operate like this. Each Pal species has a hardcoded "power level", so if you breed one of the Olympus Mons with a Com Mon, you will get the Mon with a power level that is closest to the average of the two, even if the offspring doesn't resemble either parent.
  • Pokémon: The vast majority of mons play by Gender Equals Breed and eggs are the same species as the mother... but then there's Manaphy. Manaphy is a One-Gender Race, and like other such mons, it can't breed with another Manaphy, only with Ditto. Unlike other one-gender races, the result is not another Manaphy, but Phione, which looks quite similar to Manaphy but never evolves. The Pokédex hints that is because of the conditions the egg was laid in. Manaphy is associated with cold water and Phione with warm.
  • In The Sims, when two occult Sims have a baby, their child will usually be one of the parent's occult types (for example, if a werewolf and a vampire have a baby, it will be either a werewolf or a vampire). In The Sims 4, however, it's possible for a non-vampire couple to have a vampire child if they give birth on a lot with the "On A Dark Ley Line" lot trait.
  • Bean the Dynamite from Sonic the Fighters is made this by two seemingly contradictory facts of canon. According to the instructions for the game, he is a woodpecker, but according to the Japanese guidebook, he is the son of Bin from Dynamite Dux, who is a "pet" duck.

    Web Animation 
  • Dr. Tran: Tran's friend Leland is an antropomorphic cough drop, but his grandmother is a human. No explanation is given.
  • In an example that doesn't involve animals, the Brothers Strong in Homestar Runner look nothing alike. We don't know what their parents look like, but they're all biologically related. Strong Mad has a square for a body, Strong Bad looks like a humanoid wrestleman, and Strong Sad is a fat grey elephant-footed ghost man.
  • Overly Sarcastic Productions: One Miscellaneous Myths episode notes that Classical Mythology often does this with its monsters. Why do Typhon and Echidna, two Snake People, have offspring that include multi-headed dogs and the leonine/goatish Chimaera? Who knows! Then again, this is a lead-in to talking about the Minotaur, whose origin is closer to what you'd expect.
  • RWBY:
    • In the World of Remnant mini-series, it's revealed that if two Faunus of different animal types mate, their offspring's animal type will be a complete roll of the dice. By comparison, same-type Faunus-Faunus couples always produce a same-type Faunus, while Faunus-Human couples produce either Human offspring or, more likely, a Faunus of the same type as the Faunus parent.
    • In Volume 8, we see that Fiona Thyme, a sheep Faunus girl, has a badger Faunus uncle, presumably because this occurred with either her parents or grandparents.

  • The Sunday 16 September 2012 strip of Curtailed has Mandy visit her parents. Mandy is a leopard, while her mother is a black housecat and her father is a bald eagle. Mandy's husband is a fox, who wonders if Mandy was adopted.
  • Kevin & Kell:
    • The Wednesday 8 November 2006 strip has rabbit Danielle give birth to Francis with her fennec fox husband George attending. The infant born can't be identified offhand, though he later changes almost instantly into a human boy. This is a bit more understandable, since Danielle was a former human that crossed over to Domain, and that seems to be the reason Francis turned human. The implications are not lost on Lindesfarne, another former human.
    • On the other side of the portal (and only on the supplementary Twitter), humans Catherine and Greg have a daughter who's a bear cub. Again, this is because Catherine originated from Domain, leading to her daughter becoming a Funny Animal. Oddly, though, her animal DNA seems to come from her father: Catherine was a vulture, while Greg's counterpart in Domain is a bear.
  • In Vinci and Arty, Vinci, a raccoon, eventually turns out to be the offspring of a couple of chihuahuas.

    Web Original 
  • On the Dream SMP, Fundy is canonically the son of Wilbur, who is presumably human, and Sally, a salmon. It gets even more confusing due to the fact that Wilbur is (apparently) the son of Philza, a semi-immortal Winged Humanoid, and a Samsung Smart Refrigerator. Due to this trope, this family tree is often considered "cursed lore" by the fandom.
  • In Neopets, some families in site events will all be the same species of pet, but others will have each individual as a different species. "Skeithnote  plus Zafaranote  = Ixinote " is a common joke among the fandom due to the revelation of the heritage of Sophie the Swamp Witch during the "Tale of Woe" arc. Whether the different-species children are implied to be Happily Adopted or produced organically depends on the writer It's also possible for some family members to start out as one species but then change to another, since there are several ways that magic/technology can transform pets into other species, including ones which players can use on their own pets (such as potions).
  • SCP Foundation:
    • The original version of SCP-166 was a humanoid with abilities similar to a succubus. Her mother was a nature goddess. Her father is Dr. Clef, a man with a Multiple-Choice Past who may or may not be entirely human and has claimed to be the devil. This is no longer the case in the rewritten version, where her parents are the same but she takes after her mother instead.
    • Another SCP is a very strange creature that gives birth to other species of animals with no clear pattern, including animals that are extinct or don't exist. Word of God hints that this because it is trying to give birth to a male of its own species but hasn't been able to get it right, so far.

    Western Animation 
  • The Bagel and Becky Show: Bagel and Becky are cat and dog siblings with a human mother.
  • In Blue's Clues, Mr. Salt and Mrs. Pepper are, respectively, talking salt and pepper shakers. Their children are Paprika, a spice container, and Cinnamon, a cinnamon shaker. This goes further in the reboot Blue's Clues & You!, wherein the couple have new twins — Sage and Ginger, miniature color-codednote  corked bottles. One episode briefly shows another family of living condiment containers consisting of Oil, Vinegar, and their child Vinaigrette, which makes more sense.
  • In The Cleveland Show, Tim the Bear's parents were actually a black bear and a kangaroo, even though he displays no particular kangaroo qualities other than having brown fur. This is pretty much just mentioned for a gag.
  • The basic premise of Cow and Chicken is that a human couple (or rather, two living pairs of human legs) somehow have a cow and chicken as kids. The kids also have an Uncle Boneless who is a boneless chicken.
  • Cupcake & Dino: General Services, in spades. While we never see the main characters' parents, they themselves are a cupcake and a dinosaur, their grandmother is a piece of steak, and their uncle (the aforementioned steak's son) is a human with a paper bag on his head.
  • In the original Danger Mouse, Professor Heinz Squawkencluck is a mole and Dr. Augustus P. Crumhorn III is a wolf. In The Remake, there's a Professor Squawkencluck who's a chicken (and specifically stated in the background material to be Heinz's niece) and Augustus P. Crumhorn IV, who's a doberman (and has a daughter who's a poodle).
  • The Imperial Family in Kung Fu Panda: Legends of Awesomeness includes a pig (Mei Li), a water buffalo (Lu Kang), and geese (Zu Chanhua and her son Zan). No further information has been offered.
  • Mr. and Mrs. Cake from My Little Pony: Friendship Is Magic are two Earth Ponies, but their children are a Pegasus and a Unicorn. According to Mr. Cake, they're like that because they inherited traits from distant Pegasus and Unicorn relatives from both sides of the family... though he seems a little uncertain in saying so. And one of those relatives is only related by marriage, not by blood.
  • OK K.O.! Let's Be Heroes: Enid's mother and father are a vampire and werewolf, respectively. Her twin brothers are a Frankenstein's Monster and Pumpkin Person. Enid is a witch, though she gave up practicing magic to become a ninja.
  • One episode of Robot Chicken has a human mother celebrating Mother's Day with her children, a centaur, a minotaur, and a satyr. The sketch ends with her saying "Well, it's time I told you boys why I was fired from the zoo!".
  • In Rocko's Modern Life, this is combined with Lamarck Was Right. Dr. Hutchison, a female cat, marries Filburt, a male turtle, and lays an egg. Heffer, a steer, sits on the egg for Filburt. The result is two male turtles, one female cat. and a male steer.
  • The Simpsons: Discussed in "Eight Misbehavin'", in which an Adam Westing Butch Patrick (Eddie Munster) guest-stars while Apu has some minor Actor/Role Confusion.
    Apu: Hey, one question, Eddie.
    Butch Patrick: Butch.
    Apu: Yeah, right, right. If your mother was a vampire and your father was a Frankenstein [sic], how come you are a werewolf?
    Butch Patrick: Huh, I never thought of that. Doesn't make sense, does it?
  • SpongeBob SquarePants:
  • In Yin Yang Yo!, a dragon named Edna manages to have two insects for sons: a cockroach named Carl and an ant named Herman. In the finale, Master Yo, a panda, turns out to be Yin and Yang's father despite their being rabbits.