A schooner disappears at sea without a trace. Years later, evidence of possible survivors prompts the mother of the schooner's mate Jose to hire a tuna boat to investigate. They discover the lad living happily on a South Seas island, and, when he refuses to leave with them, they abduct him. However, Jose gets revenge by leading the ship into the lair of a mysterious giant manta ray.
Practical Effects
The 'giant' manta ray is clearly a rubber bath toy
Editing
Seamless insertion of unrelated nature documentary footage
Acting
Jose's mom delivers unhinged maternal desperation
Director
S. Edwin Graham
Trivia, insights & behind the scenes
This film is actually a re-edited version of 1936's 'The Sea Fiend,' with added scenes shot years later by a different director—explaining the jarring tonal whiplash.
The infamous 'devil monster' manta ray footage was recycled from a 1932 documentary, making this cinema's earliest example of a kaiju cameo from another movie entirely.