Despite their name, mantis shrimp are not true shrimp but a type of stomatopod: a relative of crabs and lobsters that has been on Earth for over 400 million years. There are more than 400 different species of mantis shrimp.

Peacock mantis shrimp—also called harlequin or painted mantis shrimp—are arguably the best-known of the family. These critters get their name from their kaleidoscope shell—like a peacock’s tail—and their hinged forearms which resemble that of a praying mantis and are kept tucked away until the moment of attack. These solitary, aggressive animals are famous for their ferocious punch—as fast as a bullet and strong enough to snap a crab’s claw.

Mantis shrimp live in warm, shallow waters