1, ACIPENSER sinensis: ACIPENSER sinensis ash, commonly known as: the head and back bones of mandarin fish and wax gourd are smooth. The anterior bony plate of dorsal fin is generally 12 ~ 14. The skin between the larval bone plates is smooth and the adults are rough. The skin of the head is covered with a plum blossom-shaped sensory trap. Gill harrow 14 ~ 28. It is a migratory fish, inhabiting rivers and offshore seabed. Autumn can be traced back to the upper reaches of the river, where the water is fast and the bottom is gravel. The spawning period is from early June 65438+ 10 to early October165438+10, and the eggs are sticky. Generally, mature males weigh more than 80 kg and females weigh more than 240 kg. The parent sturgeon basically stops eating during the breeding period. Young sturgeons mainly eat various benthic organisms, while adult fish eat insect larvae, diatoms and humus.

2. Yangtze sturgeon: ACIPENSER davidianus, commonly known as ACIPENSER davidianus, the skin between the bone plates of ACIPENSER davidianus and Elaeagnus angustifolia is covered with granular tiny protrusions, which are extremely rough, and the larvae have obvious small thorns on the back of their heads. There are 10 ~ 12 bone plates in front of dorsal fin. Gill harrow 33 ~ 54. It is a kind of freshwater settled fish, which lives in Shixi, the upper reaches of the Yangtze River, where the current is relatively fast and the bottom of Shihezi is relatively low. The main food is benthic invertebrates, which are sexually mature individuals. The female fish weighs about 20 Jin, and the male fish weighs about 10 Jin. Caviar can be added to fish eggs, and swim bladder and notochord can be used to make fish glue.

3. Sturgeon: English name of sturgeon: Psephurus gladius (Martens), commonly known as: elephant fish and sturgeon have special drill bits, accounting for 1/3 of body length, and individuals are about 1/2 of body length, with plum-blossom-shaped induction traps. The snout is long and sword-shaped, and its ventral side has 1 pair of short whiskers. Eyes are very small. The mouth is large, downward and arc-shaped, and the upper and lower jaws have fine teeth. Branchial foramen is large. The trailing edge of the branchial membrane is pointed. The body surface is smooth and scale-free. Habitat in the middle and lower reaches of rivers, sometimes entering large lakes. Hiking, intense sex, fish as the main food, but also shrimp, crab and so on. Laying eggs in the upper reaches of the Yangtze River in spring.