King Shark

This lowborn son of an ancient shark god was the terror of the Hawaiian seas, before hard time with the Suicide Squad turned him towards a life of maritime crime.

Not to be confused with the mutated Green Lantern enemy “The Shark,” or white-collar Batman villain “Great White Shark,” King Shark was originally an enemy of Superboy—although today, he’s more commonly associated with villain ensembles such as the Secret Six and the Suicide Squad, or as an enemy of Aquaman. The son of a shark deity, Nanaue usually seeks little more than to feed his prodigious appetites, though since his liberation from the Suicide Squad, he’s set his sights on loftier goals: the criminal underworld of Atlantis.
 

For more on King Shark's history, visit his page on DCUniverse.com.