King Shark is a supervillain and sometimes an antihero appearing in American comic books published by DC Comics. The character, also known as Nanaue, was created by writer Karl Kesel and artist Tom Grummett. King Shark's first key appearance was in Superboy #0 as a cameo before making his first full appearance in Superboy #9. The character originated as a recurring enemy of Superboy and later Aquaman. As the character underwent development by later writers, he was featured more prominently as a member of the Secret Six and Suicide Squad anti-hero teams.