

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.

Jabberjaw and his friends try to defeat Dr. Lo, who has developed a growth ray which is threatening the underwater cities.
Aired: 9/11/1976
After Biff gets them kicked out for a publicity stunt, aliens land in the undersea city of Hydrostan. It's up to Jabber and the gang to stop their invasion.