Sundarbans: World's Largest Natural Shield, a Gift to Bengal Not only are the Sundarbans the world's largest mangrove delta, but also the only natural buffer against the terrifying tropical cyclones born in the Bay of Bengal. Home to the Royal Bengal Tiger, it is also the habitat of over 400 species of mammals, birds, fish, and reptiles including the giant saltwater crocodile and the rare Batagur Baska turtle. This film tells us why we must preserve the region's unique biodiversity if we are to