Marvel (#Amphibi) Back to listing Description Amphibian is the name of two different fictional characters that have appeared in publications from Marvel Comics.The first Amphibian debuted as a member of the team of superheroes called the Squadron Supreme in Avengers (vol. 1) #148 (June 1976). Name Amphibian Super Name Amphibian Code Amphibian Are you sure you want to %action_name%?