DC

Waylon Jones, better known as Killer Croc, is a DC Comics character who first appeared in Batman #357 in 1983. He suffers from a rare genetic condition that gives him reptilian features, including hardened, scale-like skin. The disease continues to progress, worsening his appearance and driving him further away from his humanity.

In some iterations, Killer Croc is portrayed with enhanced strength, speed, and durability, making him a formidable physical threat. His appearance and abilities vary slightly across different media, but the core concept of a reptilian humanoid criminal remains consistent.

Killer Croc is often depicted as residing in the sewers beneath Gotham City, which also serve as his hunting grounds. This location emphasizes his isolation and the feral nature associated with his character. He is a popular villain in the Batman mythos, known for his monstrous design and brutal methods.