Draw the head line and back line of the Yangtze sturgeon. Draw the fin reed of Yangtze sturgeon. Draw the tail of Yangtze sturgeon. Color, and the stick figure of the Yangtze sturgeon is finished!
White sturgeon (scientific name: Psephurus gladius) is a kind of fish belonging to the genus Acipenser. The body length is 2 ~ 3 meters, the weight is 200 ~ 300 kilograms, and the maximum length can reach 7.5 meters. The paddlefish is a large carnivorous fish that lives in the Yangtze River and is unique to China.
In ancient China, the white sturgeon was called tuna. Spring spawns against the current. It is mainly produced in Yibin, the main tributary of the Yangtze River in China, and also distributed in Qiantang River and the lower reaches of the Yellow River. Rare animals in China belong to national first-class wildlife protection and are known as "giant pandas in water".
The body of ACIPENSER sinensis is spindle-shaped, with a slightly flat front, a stout middle and a slightly flat back. The head is extremely long, more than half of its length, with plum blossom traps on it. Kiss the ventral surface of the head, and the ventral surface can stretch freely.
There is a record in ancient books that "the mouth of sturgeon is under the jaw, and the person with long nose cartilage is also", which makes a concise summary of the ecological characteristics of sturgeon. The upper and lower jaws have small, pointed teeth; A pair of kissing whiskers, short, located on the ventral surface. A pair of small eyes with small beards are located on the ventral side of the kiss.
The oral fissure is large, arc-shaped and elastic, and is located on the ventral side of the head. There are two external nostrils on each side of the head. The whole surface of the head membrane is densely covered with many fine plum-blossom sensory nerve cells.