History ArtisticLicenseBiology / WesternAnimation

* ''WesternAnimation/SpongeBobSquarePants'' pretty much tears the book of the biology of marine life. The most common example is [=SpongeBob=], Patrick, Squidward and Mr. Krabs (occasionally) having skeletons despite them being invertebrates. And Squidward is an octopus who has a lipped mouth underneath his eyes (and big, drooping nose!) instead of a beak in the centerpoint of his arms, which there is only [[FourLeggedInsect six of instead of eight]] (although that was done on purpose to make animation easier).

* Done in ''WesternAnimation/TheFairlyOddParents'' episode where Timmy's Dad's first time on the ''Series/AreYouSmarterThanAFifthGrader'' spoof, "Are You Brighter Than a 6th Grader" had him answer "sea cucumber" to nearly all the questions until the last one, "what kind of cucumber lives in the sea" prompting him to say the wrong answer. Forcing himself to re-attend school, Timmy's Dad retakes the competition and goes on a roll until the last question, "which sea vegetable would suit perfectly on an undersea salad", causes him to hesitate until he finds it in himself to say the right answer. In spite of the name, sea cucumbers are ''not'' cucumbers or vegetables in general, but animals -- specifically echinoderms, like starfish. ''Regular'' cucumbers aren't technically vegetables, even.

** In "Tales from the Crib", Pal the (non-anthro) dog is seen eating chocolate ice cream and being fine. In real life, chocolate can make dogs sick, with the symptoms ranging from nausea to ''death''.

** In "The Unkindest Cut", after a GroinAttack from a shark results in Quagmire's penis being ripped off, Ida gives him the latter's penis from before she transitioned. Thing is, her penis wouldn't have been removed in the first place, just reshaped and tucked into her body to simulate a vagina. This one overlaps with SeriesContinuityError since her first appearance had her point out that this process is what happened during the surgery.

* In ''WesternAnimation/MummiesAlive'', for the most part the titular mummies are treated as though they're essentially the living dead reanimated to guard the reborn prince, such as them being the only beings immune when the Tree of Life was damaged and everything else began to age rapidly. However, their need for food appears genuine rather than purely psychological; when the mummies underwent a FreakyFridayFlip in "Who's Who", Rath and Armon are legitimately shown as being hungry when they swapped bodies, with Armon-in-Rath feeling full after eating only a fraction of his usual large meals while Rath-in Armon felt Armon's hunger pains, neither of which would apply if they just ate because they wanted to rather than because they had to.

* In ''WesternAnimation/DannyPhantom'', failed cloning resulted in a [[DistaffCounterpart female, younger version of Danny, named Danielle]], who would [[CastFromHitPoints devolve into ectoplasm]] if she used her powers. She got better. Cloning ''should'' produce a younger version, just a fair bit more so than the cartoon likely portrayed. The entire thing was an obvious reference/homage to the '90s Clone Saga from ''Franchise/SpiderMan'', which similarly botched cloning in many, ''many'' ways.

''WesternAnimation/AquaTeenHungerForce'': The male bees in "Sweet C" are worker bees, and therefore, should've all been female.

** In ''"Freezing Cold"'', the cockroaches are shown having navels. Cockroaches, not being mammals, do not have navels.

* ''WesternAnimation/TwelveOunceMouse'':
** In the first episode, Fitz throws up. Mice can't vomit in real life.
** Fitz's wife has [[NonMammalMammaries human-like breasts]].
* ''WesternAnimation/OggyAndTheCockroaches'':
** The cockroaches have been shown to have endoskeletons on numerous occasions via XRaySparks. Real cockroaches have exoskeletons.
** In ''"Freezing Cold"'', the cockroaches are shown having navels. Cockroaches, not being mammals, do not have navels.