No dual identity
Place of Birth
Unrevealed; became sentient in North Atlantic undersea laboratory
Sub-Mariner #70 (1974)
Sub-Mariner #71 (1974)
The mutagens in the Piranha interacted with the altered school, and over time each piranha evolved into a duplicate of the humanoid Piranha. These Piranhas traveled to the North Atlantic to an undersea amphitheater, where they kidnapped humans from ships and forced them to battle—those who won were returned to their ship and those who lost were devoured. Namor and the Thing (Ben Grimm) stumbled into this mess, and the Piranhas kidnapped Grimm's girlfriend Alicia Masters, forcing the pair to fight for her survival. Their battle "accidentally" damaged the gladiatorial arena, and Namor rescued Alicia while the Thing collapsed the cave, apparently killing all the Piranhas before escaping himself.The original Piranha eventually regenerated and sought vengeance on Namor. Atlantis was then controlled by the warlord Attuma, and the Piranha joined Attuma's Atlantean defenders alongside Nagala, Orka, Sea Urchin (Jeremy Swimming Bear) and Tiger Shark. When the Sub-Mariner invaded Atlantis with the Defenders, the Piranha attacked him, but the Defenders were teleported away before the fight could conclude. They returned not long after, and the Valkyrie bested the Piranha, and Namor defeated Attuma, freeing Atlantis, and the Piranha fled.