The main producing areas of cod in China are Bohai Sea and Yellow Sea, and Canada, Russian, Japanese and Iceland are also the main producing areas of cod. Cod is a kind of cold-water fish with fresh and tender meat, sweet taste and rich nutrition, which is beneficial to human health.

Cod is a kind of cold-water benthic fish, which feeds on invertebrates and small fish and is scattered in Jingyang, Beining, North America, Europe and America. Both sides of Europe and the United States generally inhabit the lower layer, from the nearshore to the deep sea, and are native to the cold water area of Europe and the United States from northern Europe to Canada and the eastern United States. In the world, cod production is very important to Canada, Iceland, Norway and Russia, and Japanese production is very important to the North Sea. Erguo is mainly distributed in Bohai Sea, Yellow Sea and northern East China Sea. There are important fishing grounds in the north of the Yellow Sea, east-southeast of Shandong Higher Education, south of the island and south of the East China Sea.