Ha Long Bay is located in the geographical area connected between Bai Tu Long Bay and Cat Ba Archipelago forming a sea - island complex with favorable natural conditions to form a diverse system of habitats sea and island. This is the basis for the formation of biodiversity for Ha Long Bay. Scientists have evaluated Ha Long Bay as a high biodiversity area. The biodiversity value of Ha Long Bayinclude the diversity of ecosystems, the diversity of rare and diverse genetic resources of species composition.