Hairtail, cuttlefish, large yellow croaker and small yellow croaker. The four traditional economic marine fish in China are hairtail, cuttlefish, Pseudosciaena crocea and Pseudosciaena crocea. Hairtail belongs to Neoptera, Perciformes, trichiuridae, which belongs to the genus Hairtail. Hairtail is mainly distributed in the northwest Pacific Ocean, Indian Ocean and Atlantic Ocean. Hairtail is one of the fishing targets of coastal residents in China. There are a large number of hairtail resources along the coast of China, from Beibu Gulf in the South China Sea to Bohai Sea in the north.