His voice was provided by David Hayter, who is famous for providing the voices of the characters Solid Snake and Big Boss in the Metal Gear video game series.
On Earth-2 Shay Lamden was a marine biologist until the explosion of the S.T.A.R. Labs particle accelerator turned him into a meta-human. As many meta-humans before him, he was brought to Central City by Zoom to kill the Flash.
The Viking Alliance
King Shark pretends work for The Viking Alliance while he secretly works for Zoom.
LOTM: Jisatsu Sqaudron
King Shark is one of the current members of Gorbachev's Operational mission task force, and he has a connectivity with Killer Frost later in the series.