The Baiji is a 'possibly' extinct species of freshwater dolphin, and is thought to be the first dolphin species driven to extinction due to the impact of humans.
Since Baiji means "White Fin" in Chinese, it means "White-Finned Dolphin."
Gestation would last 10-11 months, delivering one calf at a time. The interbirth interval was 2 years.
Males reached sexual maturity at age 4 / the female at age 6.
Mature males were about 7ft 7in long / the females 8ft 2in long.
In the wild, the lifespan was 24 years.
Because of its poor vision, the Baiji relied primarily on sonar for navigation. This sonar system plays an important role in socializing and group coordination, expressing emotions.