Devil Monster

Devil Monster 1936 is an American adventure film directed by S. Edwin Graham. The working title of the film was The Great Manta and it was shown in Great Britain as The Sea Fiend in 1938. Also, a Spanishlanguage version entitled El diablo del mar, directed by Juan Duval using some of the same actors and footage, was released in the United States in 1936 by Cinexport Films.

Source: Wikipedia