Defense and movement of crustaceans

Crustaceans share the same type of muscles as insects which allow them to move quickly. Some crustaceans also possess an exoskeleton, but it’s called the carapace. The carapace is a lot tougher and heavier compared to an insect’s exoskeleton which makes them a lot harder to kill and eat from predators.There are many sub groupings of crustaceans but they all move in a similar manner where they move along the seafloor by walking while smaller crustaceans, such as shrimps and prawns, swim in the water. For defense purposes, crustaceans have a variable amount of pincers. Pincers allow crustaceans to fight predators as well as catch their prey and eat them. There are special crustaceans that have special defense mechanisms. The hermit crab only has a tough exoskeleton at the front part of its body. Its tail is relatively soft so they must carry a harder shell to hide their tails for protection from predators. The peacock mantis shrimp is another unique crustacean. They bear claws that actually punch with the speed equal to a .22 caliber bullet which can destroy the shells of crabs, and gastropods. They can easily defend themselves from other predators, though they still get eaten