Different shapes: sturgeon is a rare ancient fish left over from Mesozoic 150 million years ago, so the ossification degree of sturgeon bones is generally declining. Its central axis is an ossified elastic notochord without a vertebral body, but most of the cartilaginous shells along the skull are not ossified. Its tail fin is crooked, and its dorsal fin is opposite to its gluteal fin.

The Chinese sturgeon is long and slender at both ends, with a narrow back and a straight abdomen. Its ventral fin is small and rectangular. The gluteal fin is opposite to the dorsal fin, below the middle of the dorsal fin, and there are 1 longitudinal spiny scales on the upper edge of the caudal fin of ACIPENSER sinensis.

Characteristics of ACIPENSER sinensis

Acipenser sinensis is the largest and longest-lived freshwater fish, with its powerful shape, huge individual and long life span, with the longest life span reaching 40 years. Adult sturgeons can reach more than four meters long and weigh nearly one thousand kilograms, ranking first among 27 species of sturgeon in the world.

According to the literature, it weighs 560 kilograms at most, and is known as the "king of sturgeon" and the "king of fish in the Yangtze River". The average mature male fish weighs more than 80 Jin and the female fish weighs more than 240 Jin.