Recently a study concluded that rise in salinity in the water system that makes the Indian Sunderbans has resulted in the decrease of population of the Ganges River Dolphins in the region.The national aquatic animal is no longer sighted in the central and eastern parts of the archipelago. Only in the western part of Sunderbans, where the salinity is lower, could researchers find some evidence of the species.

About Gangetic Dolphin:: Dolphins are one of the oldest creatures in the world along with some species of turtles, crocodiles and sharks.The Ganges river dolphin was officially discovered in 1801. Ganges river dolphins once lived in the Ganges-Brahmaputra-Meghna and Karnaphuli-Sangu river systems of Nepal, India, and Bangladesh. But the species is extinct from most of its early distribution ranges. Gangetic Dolphin is classified as endangered by the IUCN Red List . The Ganges river dolphin can only live in freshwater and is essentially blind. They hunt by emitting ultrasonic sounds, which bounces off of fish and other prey, enabling them to “see” an image in their mind.