Chinese mitten crab specimen

Chinese mitten crab is an arthropod belonging to the family Archidae in the order Decapoda of the phylum Arthropoda. Its chest armor is round and square, with the latter half wider than the front half; There are six symmetrical protrusions in front of the stomach area, each with granules; The boundary between the gastric and cardiac regions is significant, with concave spots around the former; Wide forehead, divided into four teeth; The upper edge of the eye socket protrudes in a triangular shape near the middle; The anterior edge has four acute teeth, oblique to the outer side of the gill area; The inner and outer surfaces of the palmar and phalangeal bases are densely covered with fuzz, and the inner end of the wrist has a sharp thorn. The dorsal edge of the long segment also has a sharp thorn near the end, similar to the long segment of the foot. The Chinese mitten crab is also known as the river crab or hairy crab.