The crab is a crustacean whose body consists of three parts: head, thorax, and abdomen. The head of the crab has 2 tentacles, the thorax is divided into 8 thoracic segments, each with 1 pair of feet, and the crab has 8 legs in total***.The 8 lower legs are used for walking and help the crab to move on the seabed or on the beach, and the crab's two large pincers are mainly used for foraging and defense. The large pincers are thicker than the smaller legs and come in different shapes, sometimes used to catch prey and sometimes to protect themselves.