Acipenser sinensis (scientific name: ACIPENSER sinensis) is a fish of the family ACIPENSER. Common individuals have a body length of .4-1.3m and a weight of 5-3kg; The largest individual is 5 meters long and weighs up to 6 kilograms.

is the largest fish in the Yangtze River, so it is called "the fish king of the Yangtze River". The body is spindle-shaped, the tip of the head is long, and there are four whiskers in front of the mouth. The mouth is located on the ventral side, which is flexible and can be stretched into a tube. The body is covered with five lines of large and hard bone scales, one line on the back and two lines on the body side and the ventral side.

The caudal fin is crooked, the lateral fin has a broad base, and the dorsal fin is opposite to the gluteal fin. The ventral fin is located in front of the dorsal fin, with spiny scales at the base of the fin and caudal fin, spiral valves in the intestine, anus and drainage holes near the base of the ventral fin, and the opening of the fallopian tube is far away from the ovary.

History of Florology:

The sturgeons belonging to the Chinese sturgeon all appeared in the Upper Cretaceous at the end of Mesozoic, about 14 million years ago. China once found the sturgeon fossils in the Late Jurassic strata in Beipiao, Liaoning Province (14 million years ago). This kind of sturgeon has only one line of lateral line scales on both sides, and the other body surfaces are bare, which is different from that of Chinese sturgeon with five lines of scales. Sturgeon is one of the most endangered fish groups.