(2) China is a large-scale migratory fish that swims upstream (from the ocean to the river), and it is an ancient and rare fish unique to China. China's first-class protected animals are one of the most primitive species of fish in the world, and the largest individual can reach more than 500Kg, so it is known as the "Yangtze River Fish King", with a general life span of more than 30 years.
(3) As far back as 1 1,000 years BC in the Zhou Dynasty, the Chinese sturgeon was called the King Tuna, belonging to the order Acipenseriformes. Acipenser first appeared in the Early Triassic 230 million years ago, and has continued to this day, living in the Yangtze River valley of China, which is really a "living fossil".
Therefore, the answer is: (1) The body is long spindle-shaped, the snout is pear-shaped, the base is broad, the snout is pointed, and slightly upturned. The lower part of the mouth is transverse, and there are short whiskers in front of the mouth. The eyes are small, and there are crescent-shaped spray holes on both sides of the head behind the eyes, and the whole body is covered with five rows of prismatic bone plates. The caudal fin is crooked and the upper leaves are particularly developed.
(2) migration;
(3) Acipenser sinensis, as a living fossil in aquatic organisms, has high scientific research value and is a treasure in the Yangtze River.