The film was shot in Puerto Rico back-to-back with two other Corman productions, The Last Woman on Earth and Battle of Blood Island, from a script that had previously been filmed as Naked Paradise and Beast from Haunted Cave.
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Screenwriter Charles B. Griffith was asked to rewrite a screenplay that had previously been filmed as Naked Paradise and Beast from Haunted Cave for the new locations, to complete the screenplay in three days, and that Corman would be playing one of the characters, Happy Jack Monahan.
Robert Wright Campbell's script was rewritten by Charles B. Griffith, who claimed Corman asked him to reuse his screenplay for Atlas (1960), Beast from Haunted Cave (1960) and Creature from the Haunted Sea (1961).
Black Sea | Mediterranean Sea | Baltic Sea | North Sea | Red Sea | Caspian Sea | Caribbean Sea | Adriatic Sea | Aegean Sea | South China Sea | Creature from the Black Lagoon | Sea of Japan | Irish Sea | Westland Sea King | Dead Sea | Arabian Sea | Tyrrhenian Sea | Southend-on-Sea | East China Sea | Ionian Sea | Most Haunted | Bering Sea | White Sea | Kara Sea | First Sea Lord | Manly-Warringah Sea Eagles | Dead Sea Scrolls | British Sea Power | Tasman Sea | Sea Islands |
The release also features the other two entries in Corman's "Puerto Rico Trilogy" – Creature from the Haunted Sea and Battle of Blood Island – films shot back to back with Last Woman.