The upper and middle reaches of the Kaijiang River are located in the hilly and mountainous areas, where agriculture is the main industry, and there are not many townships and townships, and the water quality is not polluted, and the local area is rich in crops such as rice, maize, and sweet potatoes, etc. During the harvesting season, the residual grain particles on the slopes, together with various kinds of worms and other insects are washed by the rain into the river, which form a large amount of food for the fishes, and the aquatic plants in the water are many, so that there are abundant sources of food for the fishes. Therefore, the fish growing in Kaijiang River is also very rich, Kaijiang River mainly grows fish for crucian carp, carp, catfish (locally known as chub barang), grass carp, silver carp, fish (crow bar), snapper, yellow catfish (yellow croaker), triangular front and some other unknown miscellaneous fish. The wild fish of the Kaijiang River are mostly clustered in a section of each weir. Wild crucian carp are large and slender, with thick and flavorful meat.
Kaijiang River, in addition to wild fish, some years ago Luojiang County Resin Plant due to sewage treatment did not meet the standards, by the local environmental protection department ordered the plant to Kaijiang River for several years worth of hundreds of thousands of carp, crucian carp, grass, silver carp fry, the plant now meets the standards, although not stocked, but the previous release of the fish fry, in Kaijiang River reproduction, which is one of the reasons why Kaijiang River is currently more fish. In addition, the Kaijiang River Luo Jiang section of the Panlong Power Station, Tongjiang Township, Victory Power Station, was a Ye boss successively contracted (all put fishing, Panlong Weir three yuan a person, Victory Weir two yuan a person), in 2005, the boss stocked a million dollars of fish fry (to chub, grass carp-based), who knows that the sky is the wind and clouds in August of that year, coinciding with the upstream of the Anxian flash floods, the river soared, the barrage instantly rushed across the river net, a big water will be stocked! Fish fry washed away a few exhaustive eighty percent, so that the current Kaijiang River small (500 grams or so) chub small grass carp into groups.