1, ACIPENSER sinensis is a national first-class protected animal and living fossil. The Chinese sturgeon is slender, spindle-shaped, with a pointed head and bare bones at the top. The mouth is low and transverse. There are two pairs of beards in front of the mouth and abdomen. There are 5 ribs of hard scales on the body surface, with back 1 row, body side 2 rows and abdomen 2 rows. Tail fin is a curved tail with long upper leaves and short lower leaves.
2. ACIPENSER sinensis goes upstream from Haikou along the Yangtze River to Jinsha River to Pingshan from September to165438+10 every year. The larvae drift to the lower reaches of the Yangtze River and the estuary beach to fatten and grow, and the larvae move to shallow water to grow until they mature. Every autumn, when the Chinese sturgeon migrates upstream, a large number of Chinese sturgeons can be caught in each river section, so it is called "the fish king of the Yangtze River". 20 13 has no natural breeding activities of Chinese sturgeon, and the wild Chinese sturgeon population is in danger of extinction.
3. Acipenser sinensis is the largest fish in fresh water and has a special physiological structure. Acipenser sinensis has a spindle-shaped body, a blue-gray or grayish-brown head and back, a grayish-white abdomen and gray fins. There are no thorns in the whole body, only a small amount of hard bones. A row of beautiful bone plates on the back, two rows of beautiful bone plates on the side and five rows of cartilaginous vertebrae support a huge body.