This 1980 horror film is basically an updated "Creature from the Black Lagoon"
featuring fishmen hybrids terrorizing a coastal town killing dogs and men, but
trying to mate (more like rape) with the women. This could've been better because some parts are boring and disturbing, but there's some good, gory make-up effects by Rob Bottin. The late, Vic Morrow (Twilight Zone: The Movie)
also appears. You could give this a try if you're into creature features.
Review of Humanoids from the Deep
