Seaman is a member of the Super Best Friends. Modeled after Aquaman from DC Comics' Superfriends cartoon, he can breathe underwater and communicate with sea creatures. He also has an avian sidekick, Swallow, who joins him on adventures. The other Super Best Friends pronounce his name "semen", which Seaman will angrily reply back "It's SEA-MAN!" and they all laugh. His sidekick is a bird named "Swallow"; this increases the ridicule he receives from the rest of the Super Best Friends.
Seaman wears a costume consisting of light green pants, blue shirt, green gloves, black underwear over his pants, and a gold belt. He has wavy blond hair and blond eyebrows.