A Risso’s dolphin caught up in fishing line. Dolphin numbers in the Indian Ocean may have drop

A Risso’s dolphin caught up in fishing line. Dolphin numbers in the Indian Ocean may have dropped by more than 80% in recent decades, with an estimated 4 million small cetaceans caught as “by-catch” in commercial tuna fishing nets since 1950, according to a study

Photograph: Andrew Sutton/Central Studio

(viaThe week in wildlife – in pictures | Environment | The Guardian)