Cod (local names: Datouqing, Datouyu, Datouyu, Mingtai Fish, Shuikou, Broad-mouthed Fish, Datouxing Fish and Lithocarpus Fish). Pure cod refers to cod, which is divided into Atlantic cod (Gadus morhua), Greenland cod (Gadus ogac) and Pacific cod. [1] Under the order Codidae, the common concept of Cod is extended to Codidae, with more than 50 species, most of which are distributed in the continental shelf of the northern Atlantic Ocean. The important species are haddock, blue cod, green cod, toothfish, Norwegian long-arm cod and pollock. Cod is one of the largest fish caught in the world every year, and it has important edible and economic value.

Eel, Pinyin: Pinyin: mán alias: white eel, white eel, river eel, eel, green eel, wind steamed bun, Japanese eel. Eel refers to the general name of species belonging to the classification of Anguilla. Also known as eel, it is a kind of fish that looks like a long snake and has the basic characteristics of fish. In addition, eels have migratory characteristics similar to salmon. Eel is a kind of fish, which looks like a snake, but has no scales. It is generally found in the waters bordering fresh water in Yu Xian.