Freshwater river dolphins are among the most endangered cetaceans on Earth, threatened by dam construction, fishing gear entanglement, and pollution in the river systems they exclusively inhabit.
River dolphins confined to single river systems cannot escape pollution, dam barriers, or fishing pressure by moving elsewhere. The loss of the baiji represents the first cetacean extinction in modern times — an intelligent, socially complex mammal driven to oblivion within decades of serious threats emerging. Surviving river dolphin species face the same pressures. Individual dolphins entangled in fishing gear drown. Those in heavily polluted rivers accumulate toxins causing immune failure and reproductive disruption. The welfare and conservation cases for river dolphin protection are identical.