Creature from the Haunted Sea is a 1961 horror comedy film directed by Roger Corman. Written by Charles B. Griffith, the film is a parody of spy, gangster, and monster movies (mostly Creature from the Black Lagoon), concerning a secret agent, XK150 (played by Robert Towne under the pseudonym Edward Wain), who goes under the code name "Sparks Moran" in order to infiltrate a criminal gang led by Renzo Capetto (Antony Carbone), who is trying to transport an exiled Cuban general with an entourage and a large portion of the Cuban treasury out of Cuba. Filmgroup released the film as a double feature with Devil's Partner.

It was the last of an unofficial trilogy of black comedies by Griffith and Corman which also included A Bucket of Blood (1959) and The Little Shop of Horrors (1960). Corman later said "the surprise to me was there were three of these low-budget comedy-horror films... that were all so audacious; I mean, it’s so wild to do films that cheaply and on that short a schedule and with such insane subject matter. It seemed to me I would have either a great success or a colossal failure. It was disappointing that they were all modest successes. And it didn’t figure that I could do something so wild and get a little conservative return on the money and the end would be so routine."In 1982 Corman said "Hardly anyone has ever seen this movie or even knows that it exists" but the film has developed a minor cult reputation.