我国珍贵、稀有的水生动物──白鳍豚、扬子鳄、文昌鱼朱良彦白鳍豚是世界上稀有的淡水鲸类，也是现今生存的鲸类中最原始的一类。为此，在科学上有重要的研究价值。它体长２～２．５ｍ，背部浅灰色，腹面白色；头部有狭长的吻突，上下颔上生长着圆锥形的牙齿；头部背面有... China’s rare and rare aquatic animals - Baiji Dolphin, Chinese alligator, and Amphioxus philoxeroides are the rare freshwater cetaceans in the world, and they are also the most primitive species of cetaceans living today. For this reason, there are important research values ​​in science. Its body length is 2～2.5m, its back is light gray and its ventral surface is white; the head has narrow and long kisses, and conical teeth are growing on the upper and lower jaws; the back of the head is...