Leatherhead was a giant Albino alligator before he swam through a portion of Florida's Everglades swamp, which had been contaminated with mutagen. Upon making contact with the mutagen shortly after contact with a Cajun trapper, he mutated to his current humanoid form. Leatherhead wears a yellow cargo vest, blue rubber waders, a brown belt, and a disheveled pink hat. He usually carries bear traps and large crayfish on his person. He speaks with a cajun accent and captures any who enter his swamp.