Mantis Shrimp

Mantis shrimp, a.k.a., stomatopods, are some freaky creatures. They're neither mantis nor shrimp, but a different kind of arthropod in the crustacean sub-phylum. What's so special about them? They're weird-looking, they can attack prey with the force of a bullet to literally smash their shells (or the walls of an aquarium), and their amazing eyes can perceive a form of light that I didn't even know existed. Who needs science fiction with these things around?