Panjin river crab official name of the Chinese mitten crab, also known as crab, hairy crab. Individual large, high economic value, is an important aquatic resources, its meat flavor, nutritious, for the aquatic products in the top quality. According to the analysis, per 100 grams of edible part of the protein content of 16%, 5.5% fat, carbohydrates 7%, vitamin A600 international units, are higher than other aquatic products.

Biological features: Panjin river crab belongs to the higher crustaceans, in the animal classification belongs to the phylum Arthropoda, Crustacea, Decapoda, Reptilia, Short-tailed family, square crabs, bow-legged subfamily, the velvet crab genus. The main characteristic of Panjin river crab is that the body is nearly round, the cephalothoracic armor is flattened, and the width is slightly larger than the length. Juvenile crabs have few spots on the back of the armor, the body is greenish-black, and the abdomen is silvery-white. In adult crabs, the back of the body is greenish-black or yellowish-black, and the abdomen is white. Frontal teeth 4, the middle two teeth sharp, its V-shaped angle is less than or equal to 90 ° acute angle or right angle, the fourth lateral teeth than the Yangtze crab tiny, the second step foot long section end did not reach the orbital line. The setae of the second peduncle are slender, dense, and light brown or yellow. The cephalothoracic armor often shows deep red color after steaming. Panjin river crab is a migratory crustacean.