Considered as one of the hotspots on biodiversity of Viet Nam, Bai Tu Long is the home of 106 rare and endangered species and the presence of locally named tung ang ecosystems. This National Park traddles three communes: the Bai Tu Long Bay, Van Don District, and Quang Ninh province. The site offers possible benefits beyond its defined geographical boundaries. Seedlings of mangrove trees and seeds of seagrass can float and propagate in nearby islands. Sea turtles, which feed in seagrass ecosystems, move or migrate to other areas periodically. The presence of broadcast spawning coral species can provide coral larvae to nearby islands.