speeds of over ), with each strike packing of force. The speed of a raptorial appendage's strike causes cavitation bubbles to form. When those bubbles pop they release a large amount of heat, temporarily raising temperatures to near those at the surface of the sun and further weakening the armor of their prey. In addition, the surface of its hammer-claw is made up of extremely dense hydroxyapatite, laminated in a manner which is highly resistant to fracturing, and can break ordinary glass tanks. Its composition is being investigated for potential bionic use in material engineering. Aquaria Some saltwater aquarists keep peacock mantis shrimp in captivity. The peacock mantis is especially colourful and desired in the trade. While some aquarists value peacock shrimp, others consider them harmful pests because they are voracious predators that will eat other desirable inhabitants in the tank. Some of the largest specimens can break aquarium glass by striking it, and can do further damage by burrowing in live rock. Live rock with mantis shrimp burrows is considered useful by some in the marine aquarium trade and is often collected. It is not uncommon for a piece of live rock to convey a live mantis shrimp in an aquarium. Once inside the tank, they may feed on fish, shrimps, and other inhabitants. They are notoriously difficult to re-catch once established in a well-stocked tank, and there are accounts of them breaking glass tanks and damaging coral, when they wish to make a home within it. References External links Mantis shrimps could show us the way to a better DVD Stomatopoda Crustaceans described in 1758 Taxa named by Carl Linnaeus Edible crustaceans