Sundarbans is a mangrove area in the delta formed by the confluence of the Padma, Brahmaputra and Meghna Rivers in the Bay of Bengal. Sundarban Reserve Forest of Bangladesh is the largest mangrove forest in the world.

The Sundarbans is of universal importance for globally endangered species including the Royal Bengal Tiger, Ganges and Irawadi dolphins, estuarine crocodiles and the critically endangered endemic river terrapin (Batagur baska). It is the only mangrove habitat in the world for Panthera tigris tigris species.

It is the largest Tiger Reserve and National Park. Apart from being a unique largest mangrove eco-system of the world, the Sundarbans has the worlds largest deltaic mangrove forests and is also home to one of Indias most iconic wildlife species – the Royal Bengal Tiger.