Bach Long Vy island is located in centre of Bac Bo bay, it is 133km East of Hai Phong city and 130km West of Hai Nam island. It is identified in Bach Long Vy island 110 species of vertebrate species, belong to 46 families, 19 order. The mammal fauna has 16 species belonging to 6 families, 3 orders. Bird fauna: 74 species 32 families, 13 orders. Reptile fauna: 15 species, 6 families, and 2 orders, and Amphibian fauna: 5 species, 1 families and 1 order. Among 110 recorded species, there are 9 species listed in Vietnam Red Data Book 2007
1 species listed in Decree No 32
and 7 species listed in IUCN Redlist 2012.