The Monster of Piedras Blancas (1959) Poor man's Creature From the Black Lagoon demonstrates why you shouldn't feed strays, especially if they're head-ripping 6-foot tall fish-men. TIL: From a Catholic perspective, you should give a fish-man a fish AND teach him to fish.
Your daily dose of culture courtesy of Queen of Outer Space (1958) - "Men are from Earth, women are from Earth. Deal with it." - George Carlin