Synopsis for
The Flesh Eaters (1964) More at IMDbPro »

A group of young adults are stranded on an island, surrounded by a sea of peril and death. The glowing dots in the water are voracious flesh-eaters, waiting to devour any unfortunate victim. These unfortunate people happen to be stranded with a mad scientist. He collects a few of these flesh-eaters, and begins to experiment on them. Some of the castaways meet with untimely, and often viciously ugly, deaths as the scientist continues to poke at the organisms. Finally, his experiments go awry and the flesh-eaters become a large, gelatinous mass of mutation, hell-bent on devouring every living thing in sight. Our brave surviving castaways discover that blood will kill these organisms, so they inject blood into the center of the gelatinous mass and allow nature to eliminate the fiend.