Creature From the Haunted Sea (1961)
Director: Roger Corman
Actors: Robert Bean, Antony Carbone, Betsy Jones-Moreland, Edward Wain, Robert Towne
Runtime: 75 min.
A group of American exiles and criminals hatch a plot to rob some Cubans by offering to transport them out of the newly Communist country by murdering them and blaming their death on a legendary sea monster. But the sea monster turns out to be real.
Trivia: The locations and most of the cast were also used in Corman's film The Last Woman on Earth. Monte Hellman was Assistant Director. Robert Towne appears under the pseudonym Edward Wain.