Ha Long Bay is a small bay in the western part of the Gulf of Tonkin in the Northeast Sea of Vietnam, including the island waters of Ha Long City, Cam Pha City and part of Van Don Island District of Quang Ninh Province. As the center of a large area with similarities in geology, geomorphology, landscape, climate and culture, with Bai Tu Long Bay in the northeast and Cat Ba archipelago in the southwest, Ha Long Bay is limited to an area of about 1,553 km² including 1,969 islands, large and small, most of which are limestone islands, of which the core area of the Bay has an area of 335 km², dense 775 islands. The combination of environment, climate, geology and geomorphology has made Ha Long Bay a cluster of biodiversity, including tropical moist rain forest evergreen forest and coastal and marine ecosystems. shore with many sub-ecosystems. 17 species of endemic plants and about 60 species of endemic animals have been discovered among thousands of flora and fauna colonized in Ha Long Bay.
