The Chinese mitten crab is an arthropod belonging to the family Eriocheir in the order Decapoda of the phylum Arthropoda. Its head and chest armor are round and square, with the back half wider than the front half; The back is raised, the forehead and liver area are depressed, and there are six symmetrical protrusions in front of the stomach area, each with particles; The boundary between the gastric and cardiac regions is significant, with concave points around the former; Forehead width, divided into four teeth; The upper edge of the eye socket protrudes near the middle, forming a triangle; The anterior margin has four sharp teeth and runs diagonally on the outer side of the gill area; The inner and outer surfaces of the base of the palmar and phalanges are densely covered with fuzz. The inner corner of the wrist has a sharp spike, and the dorsal edge of the long segment has a sharp spike similar to the long segment of the foot. The Chinese mitten crab is also known as the river crab or hairy crab.