Mantis shrimps are carnivorous marine crustaceans of the order Stomatopoda. Stomatopods branched off from other members of the class Malacostraca around 400 million years ago, with more than 520 extant species of mantis shrimp known. From Wikipedia
The mantis shrimp's unique limb structure allows it to deliver devastating blows while remaining unharmed, offering insights for advanced safety gear.