Mister Fish

Mister Fish, an infamous villain from Luke Cage's rogue gallery, was a man who worked for the Maggia. During a heist he was effected by the radioactive isotope that they were stealing, and instead of killing him, he was mutated into a fish humanoid.

As a normal human, the man who would be called Mr. Fish was a thug for the Maggia. He was assigned to heist some special isotopes from a shipment truck. After killing the driver, the man started to unload the isotopes. As he opened one box, to make sure it was the merchandise, he was exposed to radiation. The man fell into the East River, and hours later came up a mutant. It is then that he became Mr. Fish.

Later on, Mr. Fish had a plan to go against the Maggia, but first he needed to establish his own territory. To Mr. Fish's bad luck, Luke Cage was hired to guard a certain company's trucks, and during their confrontation, Mr. Fish fell off a building and plunged to his apparent doom.

Mortimer was later revealed to be alive and warned Tombstone that Black Cat was gunning for his Harlem territory.

Mister Fish appears to be a green humanoid fish man wearing an orange costume. He has a pistol and super strength.