Details of baiji dolphin

Baiji dolphin is spindle-shaped, about 2-2.5 meters long and can weigh more than 200 kilograms. The mouth is slender, the back is light gray or blue, the abdomen is pure white, the dorsal fin is small triangle, the pectoral fin is like two palms, the caudal fin is flat and bifurcated in the middle, and it is good at swimming, with a speed of about 80 kilometers per hour. Due to long-term living in muddy rivers, the audio-visual organs of Baiji dolphin have deteriorated. Its eyes are as small as a blind person, and its ear holes are like needle eyes, which are located at the back and bottom of both eyes. But the brain is particularly developed, the sonar system is extremely sensitive, and the head also has ultrasonic function, which can quickly transmit the sound within tens of thousands of meters on the river to the brain. In case of emergency, dive for shelter immediately. Baiji dolphin is cold-tolerant, and its body temperature is usually around 36℃.