What zone does the Yangtze river dolphin live in?

The Yangtze river dolphin, also known as the baiji, primarily inhabits the freshwater zone of the Yangtze River in China. It is adapted to the river's unique aquatic environment, which includes both shallow and deeper areas. Historically, the baiji was found throughout the river, but its population has drastically declined due to habitat loss and pollution. As of recent assessments, the species is considered functionally extinct, with no confirmed sightings in the wild for several years.