A marine biologist and a government agent investigate mysterious deaths and rumors of a sea monster in a secluded ocean cove, and find themselves involved with a marine biology professor conducting secretive experiments, international spies trying to steal his secrets, a radioactive light on the sea bottom, and the malevolent thing which guards it.
Practical Effects
The creature suit deserves its own credit.
Production
Underwater scenes filmed in a tank, visibly.
Director
Dan Milner
Trivia, insights & behind the scenes
Released the same day as 'The Day the World Ended'—American International Pictures double-billed atomic monsters to maximize cheap thrills.
The 'phantom' barely appears because the suit kept malfunctioning in water, making this accidental avant-garde cinema.
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