Fin Diesel

Fin Diesel is a sentient, talking shark, usually disguised as a human in a trench coat and hat. His signature attack move is Fins of Fury.

Dick and Johnson first met Fin Diesel when assigned to answer a distress call from Atlantis. In his disguise of a trench coat and hat, Diesel was introduced as the human, former Navy SEAL, Jonathan P. "JP" Trander. Together they defeated the Order of the Fin, a sect of violent Atlantians. After being buried under rubble during combat, Diesel was considered missing in action until his return during Dick and Johnson's attack on the occupied north pole.

Diesel's father was the shark in the movie Jaws, which led Diesel to feel guilty about the people killed by him and he decided to dedicate his life to helping humans. As JP, Diesel has also claimed that David Attenborough is his cousin, although it is unclear whether this was part of his fake identity as a human or not. While revealing himself to be a shark, he again declared that David Attenborough and also Vin Diesel were his cousins, though, at a later point, he claims Vin Diesel to be his twin.