Status and conservation of facultative freshwater cetaceans in Asia

Smith, B. D.; Jefferson, T. A.
The Raffles Bulletin of Zoology (2002)

Irrawaddy dolphins Orcaella brevirostris and finless porpoises Neophocaena phocaenoides are referred to as facultative freshwater cetaceans because they occupy both fresh- and nearshore marine waters. In Asia, the especially rapid…