'Tentacles' aka 'Tentacoli' (1977) – Ovidio G. Assonitis.

This savagely human scoffing sea beast's trachea-thrashing tentacles are so terrifying, just the mere sight of 'em would sordidly shrivel a rhino's armored testicles!!!!! Hollywood veterans John Huston and Henry Fonda provide superfluous gravitas to this blissfully bonkers, barnacle blasting, scuba diver decimating, beach bunny bisecting, brine-soaked B-Movie bonanza! Should goofy seafaring schlock be your bag of soggy scampi, the wantonly carnivorous appetites of this skiff skewering, child-chomping calamari remains a mayhemic, multi-tentacled terror treat! 70s creature feature cognoscenti could do a yacht worse than checking out Assonitis attention grabbing 'Tentacles', as you're sure to have a whale of a good time! Maestro Stelvio Cipriani's stridently ear-wormy score is a legit cinematic high point, and an adorably plump Shelley Winters's shrill mumsyness was quite lovely, and strangely erotic!!!!