Killer Croc is an enemy of Batman with incredible super-strength and a crocodile-like appearance. This mutation was originally a birth defect, although he becomes more reptilian over time due to genetic experimentation. Despite his brutal savagery and heightened reflexes, his animalistic mentality results in lower intelligence. He has been a member of the Secret Society of Super-Villains and the Suicide Squad and spends most of his time imprisoned in Arkham Asylum. Killer Croc was created by Gerry Conway, Gene Colan and Don Newton, first appearing in Detective Comics #523. (1983)

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