A marine biologist, a dolphin trainer, a research scientist, and a local sheriff try to hunt down a large sea monster, a shark/octopus hybrid, that is devouring swimmers and fishermen off a south Florida coast.

• Les Films du Griffon
• National Cinematografica
• Michael Sopkiw
• Valentine Monnier
• Gianni Garko
• William Berger
• Iris Peynado
• Lawrence Morgant
• Cinzia de Ponti
• Paulo Branco