Why do mantis shrimps have such powerful punching claws?

Mantis shrimps, which are marine crustaceans and not true shrimp, use specialized raptorial appendages that can strike with extraordinary speed. The limb works like a biological spring and latch system, releasing energy so quickly that it can crack shells and create cavitation bubbles in water. Some species are smashers, while others are spearers, depending on prey type. Their strike is so fast that it has fascinated biomechanists for decades. Mantis shrimps are a striking example of convergent evolutionary engineering in arthropods.