- A five-year study by researchers
 	- Sangita Mitra (National Biodiversity Authority, Chennai) and
 
 	- Mahua Roy Chowdhury, (a marine biologist Calcutta)
 
 
has been published in the Journal of Threatened Taxa.
 	- The research has found that raising water salinity level is threatening the habitat of Gangetic river dolphins.
 
 	- Gangetic Dolphins are the only surviving freshwater dolphin in India.
 
 	- Gangetic Dolphins are found in the river systems of Ganga, Brahmaputra, Meghna and Karnaphuli- Sangu in Nepal, India and Bangladesh.
 
 	- The IUCN status of the Gangetic Dolphin is Endangered. Gangetic Dolphin is the National Aquatic Animal of India.