Based on

Movies like Fresh Fish (1939)

A tour of the waters near a South Sea island, introducing us to the various kinds of marine life, including the pickled herring, the hermit crab, the starfish, a seahorse race, and many other puns. Among the running gags, a two-headed fish who keeps asking for directions to Mr. Ripley and a professor in a diving sphere looking for a rare wim-wam whistling shark.