Films: Aquanoids (2003)
Type: Unknown, possibly Natural
Height/Weight: That of average humans.
Summary: "Fish men seek women" is not something we expected to become a genre. But between the Gillman, the Humanoids, and now this, it's safe to assume that people are just horny for ichthyology.
History: In the tourist-happy beaches of Babylon Bay, a dark force of nature is awakening. Back in the 80s, a horde of sea creatures known as the Aquanoids raided, raped, and killed all in their path. Now, the killings are happening again, and while the mayor is desperate enough to murder to cover his tracks, the Aquanoids seek blood and mates, in no particular order.
Notable Kills: A guy manages to stumble away from the water...with a chunk of his back missing.
Final Fate: It's safe to assume by the end, all of the Aquanoids are dead. We did see one get offed by a harpoon, after all. However, a budding baby can be seen on the sea floor...
Weakness: Anything conventional.
Scariness Factor: 4-For such a low-budget movie, these beasts are terrifying to behold. Aside from looking positively demonic, they have a nasty habit of impregnating women and giving rise to some fairly messed up deliveries. That, or they'll just eviscerate you horribly.
Trivia: -The main Aquanoid was played by Paul Molnar, who's defined his modern career by being in the art/makeup department of much more successful films.
-This film was directed by Reinhart "Rayteam" Peschke. It was the only film he did, as most of his career was as a cameraman for, again, more successful films (though your mileage may vary with the third Ninja Turtles movie...).