How does exoskeloten help crabs?

Exoskeletons help crabs by providing a hard, protective outer shell that shields them from predators and environmental hazards. This rigid structure also supports their body and aids in locomotion. Additionally, the exoskeleton plays a crucial role in preventing water loss, allowing crabs to survive in various habitats, including land and sea. As crabs grow, they periodically molt their exoskeletons to accommodate their increasing size.