Sturgeon family (Acipenseridae) about 20 species of temperate waters of the northern hemisphere fish collectively, and paddle-nosed sturgeon and multi-finned fish close relatives. There are five longitudinal plates on the side of the body, asymmetrical caudal fin, long, toothless muzzle, four tentacles under the muzzle; to whiskers searching for invertebrates, small fish and other food on the bottom of the water. Sturgeon can grow very large and long-lived, sturgeon (Huso huso or Acipenser huso) can live 200 to 300 years. Most live in the sea, moving upstream into rivers in spring and summer (perhaps once every few years) to spawn. Eggs are small, sticky, and numerous. Juveniles grow rapidly, and growth slows after maturity, but growth continues for several years. Sturgeon meat is fatty, eggs can make caviar, swim bladder can make fish glue, so it is easy to overfishing, so in some areas of sturgeon fishing is strictly limited. The Acipenser sturgeon (A. oxyrhynchus) is a morphologically very similar and very closely related type, which some experts believe to be a separate species, from the eastern coast of North America. Both are usually about 3 m (10 ft) long and weigh about 227 kg (500 lb). Scientific name Acipenser sturgeon Order Acipenseriformes a.k.a. Atlantic sturgeon Family Acipenseridae Border Animalia Genus Sturgeon Phylum Chordata Species American sturgeon Order Acipenseriformes subspecies Acipenser golden king sturgeon Golden King Sturgeon (A. guldenstadti) Short snout, hard scales are large and white, and the largest is about four meters. Distributed in the Black Sea, Caspian Sea coast.

Emperor sturgeon

Emperor sturgeon (A. baeri) Maximum about two meters long.

The American white sturgeon (A. transmontanus) is the largest of the North American sturgeon species, up to four meters. Juvenile fish body color pure black. As it grows, it will gradually become white, similar to light coffee color. American White Sturgeon

American White Sturgeon is a species of sturgeon produced in Russia and Europe. Sturgeon from this region are mainly harvested for caviar. This makes the natural resources of sturgeon less and less. Therefore, these places are trying to breed hybrids that can obtain high-quality caviar in a short period of time. The most famous of these is the giant sturgeon, which is a cross between the West German sturgeon and the Bering Sea sturgeon.

The giant sturgeon (A.stellatus) is about 1.5 meters long, and there are records of individuals found 2.2 meters. The muzzle is long and thin. It is found in the Black Sea, the Caspian Sea and the rivers that feed into them.

A. screnckii is a sturgeon from the Heilongjiang basin. Juvenile sturgeon, whose eggs are used to make caviar, were once hunted in large numbers. Due to the protection of the Chinese government and conservation breeding, a large number of individuals were artificially bred and released.

White sturgeon (Psephurus gladius) China's national Ⅰ class protection of wild animals. The body is long, pike-shaped, the front part is slightly flat, the middle part is stout, and the back part is slightly flattened. The length is more than 2 meters. The head is extremely long, more than half of the body length, and covered with plum-shaped traps. The muzzle is sword-shaped, particularly prolonged, narrow and flattened at the anterior end, and broad and plump at the base. The head of the muzzle is ventral and freely retractable. Upper and lower jaws with small, pointed teeth; mouth large, inferior, capable of retraction, with a pair of short whiskers anterior to the mouth, short, situated on the ventral surface. Eyes minute. The entire surface of the head dermatome is densely covered with many fine plumose spots of sensory nerve cell tissue. Gill holes are large, and the body is smooth and scale-free. In the upper lobe of the caudal fin there are eight ridged scale plates that extend backward to the upper lobe of the caudal fin. The dorsal fin begins after the ventral fin and is composed of unbranched fins. The caudal fin is crooked, with a well-developed upper lobe and a row of spiny scales on the anterior margin. The intestinal tube is short, with 7-8 spiral flaps in the intestine. The head, dorsal body and caudal fin are greenish gray, and the abdomen is white. Spawns anadromously in spring. Mainly found in the dry tributaries of the Yangtze River in China from Yibin to the mouth of the Yangtze, and also found in the lower reaches of the Qiantang River and the Yellow River. It is a rare and precious animal specialty of China and belongs to the national level wildlife protection. Now the resources are declining year by year and facing endangerment. Chinese name white sturgeon class Scleractinia Latin name Psephuyrus gladius subclass spoke fin fish subclass alias elephant fish, elephant trunk fish, arrow fish, column sturgeon sturgeon, pipefish, ancient called tuna order sturgeon-shaped order binomial Psephurus gladius suborder sturgeon subclass distribution area white sturgeon specialties in China, only distributed in the main stem of the Yangtze River, the Yellow Sea, the East China Sea also found along the coast. Family spoon-nosed sturgeon family animal kingdom subfamily shovel sturgeon subfamily phylum chordata genus white sturgeon genus subphylum vertebrate subphylum species of white sturgeon