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. Mr. Fish attempted to kill Cage by throwing him off a building but Power Man would survive the fall. Cage grabbed a steel beam protruding from the building and prevents himself from hitting the ground. Cage picks himself up and reaches Mr. Fish and his gang on top of the building. Cage takes out the rest of Mr. Fish's henchmen and destroys his gun blaster during the fight. Mr. Fish displays his awesome strength and picks a steel girder. Mr. Fish charges towards Power Man but Cage dodges the attack and Mr. Fish falls off the building and plunges to his doom.
Shadowland
Recently he is shown as a member of the Flashmob a group of Luke Cages old rouges working for Nightshade in her bid to take control of Harlem.