The baiji (Chinese: 白鱀豚 | pinyin: báijìtún | Lipotes vexillifer, Lipotes meaning "left behind" and vexillifer "flag bearer" | also called the Chinese river dolphin, Han river dolphin, Yangtze dolphin and whitefin dolphin) is a possibly extinct species of freshwater dolphin native to the Yangtze river system in China. It is thought to be the first dolphin species driven to extinction due to the impact of humans. This dolphin is listed as “critically endangered: possibly extinct” by the IUCN, has not been seen in 40 years, and several surveys of the Yangtze have failed to find it. In China. Nicknamed the "Goddess of the Yangtze" (simplified Chinese: 长江女神; traditional Chinese: 長江女神; pinyin: Cháng Jiāng nǚshén), it was regarded as the goddess of protection by local fishermen and boatmen. It is not to be confused with the Chinese white dolphin (Sousa chinensis) or the finless porpoise (Neophocaena phocaenoides). This is the only species in the genus Lipotes.