The Flesh Eaters (1964)

The only people who will not be STERILIZED with FEAR are those among you who are already DEAD!

An alcoholic actress, her personal assistant, and their pilot are downed on a secluded isle by bad weather, where a renegade Nazi scientist is using ocean life to develop a solvent for human flesh. The tiny flesh-eating sea critters that result certainly give our heroes a run for their money - and lives.