Many sci-fi creatures are creepy or downright horrifying — and the facehugger is the poster child of scary sci-fi movie monsters ... plant is a self-described "Mean Green Mother from Outer ...

I mean, you never know ... The ocean holds many bizarre deep-sea monsters. As you dive 140 meters underwater, you might see a megamouth shark. Sure, they look scary, but those 50 rows of teeth ...

Hollywood has given all of them a frightening makeover, but their backstory is scary enough. These nocturnal monsters feed off ... if you call someone a ghoul, you mean they are very interested ...