The pistol shrimp is a marine terror of small fish and invertebrates. It hunts its prey in a very unusual way.

An excerpt from the article 22 facts about crustacean

The right pincer of these animals has undergone a modification that allows them to attack their target with an air bubble accelerated to speeds of more than 100 km/h. Such a bubble is capable of stunting a small fish or splitting the shell of a hermit crab or clam.