Killer Croc

Waylon Jones  had been shunned by society due to his disfiguring skin disorder. Having gotten a job as an alligator wrestler in a side-show, he decided to make more money in crime and became known as  Killer Croc. Though he has low intelligence, Croc has super strength, accelerated healing, is a strong swimmer, hardened skin, and powerful jaws thanks to his reptilian genetics. He commonly fights Batman and Robin.