The decreasing number of dolphins because of water pollution led the Centre to declare it as national aquatic animal in May 2010.
Top marine scientists have sounded an alarm over the plight of coral reefs worldwide and the livelihood of millions of people dependent on them.
Scientists have found that humpback whales on both sides of the southern Indian Ocean sing different tunes.
Day in Pics: 30th September
Showbiz World - September 30, 2014
George Clooney - Amal Alamuddin grand Venice wedding