Yangtze River

The high water pollution caused several species found in the Yangtze River basin to be listed as endangered.

An excerpt from the article 18 facts about Yangtze River
One of the most endangered crocodilian species–the Chinese Alligator, also referred to as the Yangtze alligator–is endemic to the lower reaches of the Yangtze River.

As of July 2022, the Chinese paddlefish, also referred to as the Chinese swordfish–an endemic species in the genus Psephurus–is declared extinct.