Mantis shrimp with eggs. Mantis shrimp (order Stomatopoda) clutching a mass of eggs. Despite its name this crustacean is only distantly related to the true shrimps. It is an active predator, and uses its club-like front limbs to kill prey. It mainly feeds on crabs and molluscs, breaking open their shells with blows from these clubs. A mantis shrimp's strike is one of the fastest animal movements in the world, with a force similar to that of a low-calibre bullet. Photographed in the Lembeh Strait, Sulawesi, Indonesia.