Total Area: 10,000 Sq. km (6,017 Sq. km In Bangladesh, 4,260 Sq. km in India).
Named by: Sundaree Tree (Heritiera fomes).
Flora: A total 245 genera and 334 plant species.
Fauna: 150 species of commercially important fish, 286 species of birds, 42 species of mammals, 35 reptiles and 8 amphibian species.
Animals: Man eating Royal Bengal Tiger, Crocodiles, Spotted Deer, Otters, Fishing cats, macaques, wild boars, common grey mongooses, foxes, jungle cats, flying foxes, pangolins, Bengal Monitor, Snakes, and many more.
Rivers and Canals: 300
Attractions: Harbaria eco-tourism center, Kotka wildlife sanctuary, Kochikhali wildlife sanctuary, Jamtola sea-beach, Dubla Island, Hiron point, Karamjal crocodile breeding center, deep forest walking, small paddle boat trip and many more activities.