The Monster of Piedras Blancas (1959)

Plot

An elderly lighthouse keeper harbors a prehistoric fish-man in the depths of the coastal caves, providing it with fish and scraps to sustain its existence. This unusual arrangement is kept hidden from the world, especially from his daughter. However, when the keeper neglects to feed the creature one fateful day, chaos erupts in the small coastal town. As the monstrous being emerges in search of food, the community faces a terrifying threat, forcing the keeper to confront the consequences of his secretive actions.