Board Thread:General Discussion/@comment-26184563-20130421015649/@comment-995426-20160429194908

Yes, I get it. It means he's mentally ill and he's a cannibal, and he has an extreme fantasy version of a real world disease. Humans can do some shockingly inhuman things&mdash;they become serial killers, and all kinds of things&mdash;human history and documentation shows us precisely the depths of depravity people can descend to. But they are still homo sapiens. Killer Croc's atavism doesn't change his species, and it can't actually make him a crocodile, especially considering humans did not evolve from crocodilians. (See the cladogram I have already provided in the Category:Reptiles page.) The embryos of humans and other lifeforms undergo gradual changes in form as they develop, simulating the stages of evolution of their ancestors. With atavism, part of this goes backwards. In Killer Croc's case, parts of his development appear to have reverted to that of primitive reptiles, going even further back than the development of hair. Note that many prehistoric animals on the fossil record can superficially resemble more familiar modern animals (and are often given names evoking that resemblance), but when they are not genuine ancestors, this is an example of.

Killer Croc is still a depraved human, he resembles but is not a crocodile, and the science fiction involved is still on the harder end of the sci-fi hardness scale.