About Gangetic Dolphin:  

• The Gangetic river dolphin is India’s national aquatic animal.   
• It is a Schedule I animal under the Wild Life (Protection) Act, 1972.   
• It has been declared an endangered (EN) species by the International Union for Conservation of Nature (IUCN).  
• The Gangetic river dolphin is one of four freshwater dolphin species in the world.   

• The other three are found in the Yangtze River in China (now extinct), the Indus river in Pakistan and the Amazon river in South America.  
• The dolphin is found in India, Bangladesh and Nepal. It is blind and finds its way and prey in river waters through echolocation.   
• Dolphins prefer water that is at least five to eight feet deep. They are usually found in turbulent waters, where there are enough fish for them to feed on.  
• Gangetic dolphins live in a zone where there is little or no current, helping them save energy. If they sense danger, they can dive into deep waters. The dolphins swim from the no-current zone to the edges to hunt for fish and return. 

Source: Article