European carp generally refers to European carp. European bighead carp (Husohuso) is a kind of sturgeon. European carp is a large sturgeon, which can be as long as 600 cm and weigh 1000 kg. The height of European bighead carp is 9.0-22.0%, the head length is about 23%, and the snout length is 7.0- 12.5%. The whole body is covered with 5 ribs, the length of the kiss is less than 70% of the head length, and there are 4 whiskers; The snout is conical, the edges on both sides are round, and the head is provided with water spray holes; The mouth is large, star-shaped, the snout is flat, and the left and right branchial membranes are connected; The snout is leaflike, the highest point of the body is not at the first dorsal plate, and there is no dorsal fin posterior bone plate. The back and sides of European bighead fish are gray, sometimes black, and gradually turn white down. Its belly is white and its kiss is yellow. A large number of small bone plates and fine particles are distributed between the bone plates. In the elderly, the lateral bone plate and the abdominal bone plate are hidden under the skin.

In seawater, European herring mainly inhabits the middle and upper waters, and its vertical distribution depends on the distribution of food. In the Black Sea, European herring can dive to a depth of160m or even180m. The upstream migration of European bighead carp began at the end of 65438+ 10 or February, and ended at the end of165438+/kloc-0 or 65438+2. In spring, the population lays eggs in the year when it enters the river, overwinters in fresh water in winter and lays eggs in the following spring. The main food is aquatic insects larvae and crustaceans. European herring is distributed in Caspian Sea, Azov Sea, Black Sea, Adriatic Sea and rivers flowing into the above sea areas. These rivers are Volga, ural river and Kula rivers flowing into the Caspian Sea, Don and Kuban rivers flowing into the Azov Sea, Danube, Dniester, Nanbuge and Dnieper rivers flowing into the Adriatic Sea.