1. Mackerel

Mackerel is one of the main freshwater cultured fish in China. The length of this fish is about 40 centimeters, the whole is rhombic, the back is bluish gray, the sides are silvery gray, and the abdomen is silvery white. It is suitable for growing in still water, mainly distributed in the lakes affiliated to the middle and lower reaches of the Yangtze River. It grows very fast, has good adaptability and a wide range of feeding habits.

2. Crucian Carp

Crucian Carp is widely distributed in China. It is found in all major river systems except the Qinghai-Tibet Plateau. As an omnivorous fish, it has a wide range of feeding habits, strong adaptability and reproductive capacity, and low requirements for water temperature, which is very suitable for aquaculture. Moreover, it is mostly raised in the way of intercropping, which can be raised together with herring and grass carp.

3. Grass Carp

Grass Carp is one of the four major Chinese carps in China. It is also a rare herbivorous fish. It usually inhabits plain areas and generally lives in the middle and lower layers of the water body. It is more lively. It feeds mainly on algae and insect larvae when it is young, and on plant debris and occasionally meat when it grows up. It can be fed with grass feed and concentrated feed. The body

of herring is bluish gray, the back is dark, the abdomen is gray-white, and the fins are black. It usually inhabits the middle and lower layers of the water body, mostly feeding on snails, mussels and clams. Although it is a carnivorous fish, it can be fed with artificial feed, such as cicada pupae, bean cakes, corn and so on.