3500-4000 catties of fish can be raised in an acre of fish pond. Fish ponds generally raise economic fish, such as grass carp, herring, silver carp, bighead carp, crucian carp, carp and other common food fish. These fish are widely distributed in China, have strong adaptability to the environment, grow rapidly and are easy to raise. In addition, some of these fish can be intercropped, which can maximize the use of fish pond space.

1. Carp: Carp is essential for intercropping in fish ponds. Carp is a benthic fish, which usually lives under the water and can eat the leftover bait of other fish, so as to avoid the deterioration of fish pond sediment and play a certain role in environmental maintenance. Moreover, this kind of fish is easy to raise and has good edible value.

2. Grass carp: Grass carp is generally the main fish in intercropping. It lives in the middle and lower layers of water and usually feeds on plants, so it is easier to raise. In addition, because of its special feeding habits, it is unlikely to grab food, and it can also control the number of aquatic plants in fish ponds and reduce oxygen consumption.

3. Silver carp: Silver carp is a filter-feeding fish, which belongs to one of the four major fishes and generally lives in the upper layer of water. It can eat some algae and plankton on the water surface, thus maintaining the water quality. It should be noted that the intercropped silver carp is not the main species, so it is not necessary to raise too much.