Several people disappear from and at the sea. Their bodies are found gnawed to the skeleton, even the marrow is missing. The scientists have no idea which animal could do such things. Dr. Turner begins to suspect that the company which builds a tunnel beneath the bay might have poisoned the environment and caused an octopus to mutate to giant dimensions...
John Huston
as Ned Turner
Shelley Winters
as Tillie Turner
Bo Hopkins
as Will Gleason
Henry Fonda
as Mr. Whitehead
Delia Boccardo
as Vicky Gleason
Cesare Danova
as John Corey
Alan Boyd
as Mike
Sherry Buchanan
as Judy
Franco Diogene
as Chuck
Marc Fiorini
as Don
Helena Mäkelä
as Jamie's Mother
Claude Akins
as Robards
