Jabberjaw (a 15-foot air-breathing great white shark) and The Neptunes (a rock group made up of four teenagers — Biff, Shelly, Bubbles and Clamhead) travel to various underwater cities where they encounter and deal with assorted megalomaniacs and supervillains who want to conquer the undersea world.

• Julie McWhirter
• Barry Gordon
• Patricia Parris
• Frank Welker
• Tommy Cook