Yangtze finless porpoise is the only freshwater finless porpoise subspecies in the world, which has lived on the earth for 25 million years. Known as the "living fossil" and "giant panda in water" of the Yangtze River ecology, they are only distributed in the middle and lower reaches of the Yangtze River, Dongting Lake and Poyang Lake. Finless porpoises usually live in the waters bordering fresh water in Yuxian County, and can also live in the fresh water downstream of large and small rivers.

The finless porpoise is lively and active, often running up and down in the water, and its body keeps rolling, jumping, nodding, spraying water or suddenly turning. Whenever there are big boats in the river, finless porpoises like to follow the top waves or ride the waves.

The finless porpoise also has an interesting spitting behavior. It sticks its head out of the water and swims forward quickly, opening and closing its mouth and spraying water from time to time. When breathing, only the head is exposed, the tail fin is hidden under the water, and then dives into the water like a bounce.