What do crustaceans eat?

Most crustaceans, such as lobsters, are scavengers or predators. They use their powerful claws to catch their prey and then rip it apart. Their prey includes small fish and small crustaceans. For example, the pistol shrimp is an amazing creature. She has a specialized claw that she uses as a weapon. She quickly grabs this claw and he sends out a shockwave to attack and stun her prey. The blow from this claw is enough to break a human finger! The pistol shrimp spends most of its life waiting for prey.