Introduction to the Chinese sturgeon: The Chinese sturgeon is an ancient fish whose bones are composed of cartilage. It is classified as a cartilaginous fish, between cartilaginous fish and bony fish. It is a transition in the history of evolution. type. At present, the number is getting smaller and smaller, and it only exists in the Yangtze River Basin. It is a first-level protected animal in China. Chinese sturgeons have migratory habits and usually live in coastal areas. In autumn, they enter the Yangtze River and swim upstream. After spawning in the upper reaches of the Yangtze River, they return to the sea.