The Monster of Piedras Blancas

A monster that looks like a snarling "Creature from the Black Lagoon" invades a sleepy seaside town. The lighthouse keeper, widowed and estranged from the townfolk, has been secretly leaving food out for the monster for years, unaware of its bloodlust. When the monster's appetite outstrips the keeper's ability to serve it, bloodless decapitated corpses start to appear.

The Monster of Piedras Blancas is a 1959 horror sci-fi movie directed by Irvin Berwick, starring Frank Arvidson, John Harmon, Forrest Lewis. It holds an IMDb rating of 5.3/10 from 1,305 votes and runs 1h 11m.