From the Stomatopod (mantis shrimp) website:
Stomatopods (mantis shrimps) are predatory crustaceans that live in the shallow waters of tropical and subtropical seas. They use specialized raptorial appendages to capture and subdue prey by either "spearing" the animals or "smashing" them with heavily calcified clubs. The force of the strike of a large Californian species approaches that of a 22 caliber bullet, and is capable of breaking double layered safety glass. They are, weight for weight, probably the most formidable animals alive.
Here's the site: http://www.blueboard.com/mantis/
Stomatopods (mantis shrimps) are predatory crustaceans that live in the shallow waters of tropical and subtropical seas. They use specialized raptorial appendages to capture and subdue prey by either "spearing" the animals or "smashing" them with heavily calcified clubs. The force of the strike of a large Californian species approaches that of a 22 caliber bullet, and is capable of breaking double layered safety glass. They are, weight for weight, probably the most formidable animals alive.
Here's the site: http://www.blueboard.com/mantis/