2, snakehead is also called snakehead, raw fish, snakehead and grouper. It is cylindrical and can reach 50cm in length. The snakehead is fierce. Young fish feed on copepods and cladocera, while small fish feed on aquatic insects, small shrimps and other small fish. It is one of the harmful fish in freshwater aquaculture. It contains high protein, various amino acids and trace elements, and is suitable for people with weak constitution, hypoproteinemia, malnutrition and anemia.