An almost mythical creature, the Cocktopuss, wanders ashore and befriends B.J. Meanwhile, some prize money has been made available to anyone that captures a Cocktopuss. The mayor, spotting a political opportunity, has the Cocktopuss captured (therefore keeping the money for the city), and puts the Cocktopuss on display. B.J. and the rest of the lifeguards try to figure out some way to help this Cocktopuss.