Bighead carp is flat and tall, with a round abdomen in front of the base of the pelvic fin and a narrow abdominal edge from the back to the front of the anus. The head is huge, the front is wide, and the head is longer than the body height. This kiss is short and round. The mouth is large, end-positioned, the mouth fissure inclines upward, the lower jaw protrudes slightly, the corner of the mouth can reach below the vertical line of the leading edge, and the middle of the upper lip is very thick. No need. Small eyes, located under the central axis in front of the head; Eyes wide and bulging. The nostrils are near the top of the eye rim. Hypopharyngeal teeth are flat and smooth. There are many gill rakes, which are page-like and closely arranged, but not connected. It has developed spiral suprabranchial organs. Small in scale. The lateral line is complete, bending towards the ventral side at the end of pectoral fin and extending backward to the center of caudal stalk.

2. Characteristics of living habits

Bighead carp is gentle and doesn't like jumping. Filter-feeding, mainly eating zooplankton such as rotifers, cladocera, copepods (such as cyclops), but also eating some phytoplankton (such as diatoms and cyanobacteria) and artificial feed. From fry to adult stage, it is a typical fish that feeds on plankton, mainly on zooplankton and phytoplankton.

3. Reproductive characteristics

When they are sexually mature, they lay eggs in the river. After spawning, most individuals enter lakes along the river for food and fattening. In winter, the water level of the lake drops, and they return to the deep water area of the river for winter. In the following spring and warm season, they go back to breed. Bighead carp lays floating eggs. Sexual maturity is 4? Five years old, and the youngest male fish is three years old. The breeding season is in 4? July. The spawning grounds are mostly river bed ups and downs. When it rains in the basin, the water level suddenly rises and the flow increases, breeding activities are carried out.