Baiji

The baiji is a possibly extinct species of freshwater dolphin. It is thought to be the first dolphin species driven to extinction due to the impact of humans. Despite being listed as “critically endangered: possibly extinct” by the IUCN, this dolphin has not been seen in almost 20 years and several surveys of the Yangtze have failed to find it. In China, the species is also called the Chinese river dolphin, Yangtze river dolphin, Yangtze dolphin and whitefin dolphin.