- Investigate and update the latest data on the diversity of some marine groups living on coral reefs including of seaweed, sponges, corals, zoobenthod and coral reef fish.
- Assess the current status of biodiversity and identify rare and economically valuable species in research areas.
- Propose measures to protect and manage biodiversity in research areas.

For science:
- Research results have identified 109 species of seaweed, belonging to 4 phyla: Blue seaweed, Red seaweed, Brown seaweed and Green seaweed. The highest number of seaweed species is on Con Co island, Tran island, Cu Lao Cham, Hai Van - Son Cha (from 22 - 30 species), there are 5 areas with low species numbers: Cat Ba, Hon Me, Son Duong, Long Chau, Hon Mat. Among the identified species, 66 have economic and medicinal value such as: food, cosmetics, pharmaceuticals, agar extraction, carrageenan extraction, biofuel, fertilizer and extraction of other active ingredients.
- 199 benthic species have been identified in the study area. Among them, there are 78 species with economic value, some species have high economic value such as abalone Haliotis ovina, pearl oyster Pinctada margaritifera, Pinctada maxima, Pinctada imbricata, female snail Trochus maculatus, male snail Tectus pyramis, cone snail Conus eburneus, crab Charybdis hellerrii, Charybdis japonica. Some snail species have high artistic value such as Cypraea tigeris, Cypraea chinensis, and Trochus maculatus.
- There are 31 species of sponges belonging to 17 families and 10 orders belonging to the class Demospongiae. They are distributed on most islands and reefs and coral reefs at research sites, the Co To - Thanh Lan area has the highest number of species with 10 species, Tran island, Bach Long Vi, Con Co, and Can beach. Quang Binh has 7 species, the remaining areas have 1 - 5 species. In general, the Gulf of Tonkin region has more species than other regions. Sea sponges are mostly distributed on rocky beaches and coral reefs from 1 - 15m of water.
- A total of 281 species of coral were recorded, of which 258 species of Scleractinia hard coral, 1 species of Antipatharia black coral, 1 species of Milleporidae fire coral and 21 species of soft coral. Areas with a high number of coral species are Cu Lao Cham, Hai Van - Son Cha, Con Co, Bach Long Vy, Long Chau, Ha Long - Cat Ba with a number of over 120 species. The remaining areas have a low number of species (ranging from 23-59 species) such as Co To, Dao Tran, Hon Me, and Son Duong. The average coverage of coral reefs for the entire area is 30.9%. In Hon Con Ca, which is rated good (level 4), there are 7 reefs that are good reefs (level 3, coverage from 31-50%), 4 reefs with average coverage (level 2, coverage from 11-30%) and there are 3 poor reefs (level 1, live coral coverage less than 10%).
- Fish group with 670 species of reef fish, belonging to 240 breeds, 79 families recorded, of which 530 species belong to typical families of coral fish. Hai Van Son Cha, Con Co, and Tran Island have the most abundant fish species (from 130 - 191 species), the lowest is Hon Me archipelago with 26 species.
- Rare species groups include 11 fish species, 11 coral species and 1 black apricot species listed in the Vietnam Red Book (2007) with the levels of endangered (EN) and endangered (VU). In addition, there are 256 species of hard corals all on the IUCN red list and CITES appendix II.
- Species groups with economic value include 123 fish species with high commercial value, 254 fish species belonging to the marine ornamental fish group and 11 fish species with medicinal value. The benthic group has 78 species that are valuable for food and handicrafts. The seaweed group has 66 species with economic and medicinal value. The sponge group has 8 species that contain biologically active substances such as antiviral, antibacterial, cytotoxic, and anti-cancer.
- Within the scope of the study, there are 6 areas that have established marine protected areas and have management boards to protect biodiversity such as Ha Long, Cat Ba, Bach Long Vi, Con Co, Cu Lao Cham, Ly Son . The three areas expected to establish conservation areas are Co To - Dao Tran, Hon Me, Hai Van - Son Cha. The remaining areas have not been planned as marine protected areas. To protect resources, biodiversity and ecosystems, it is necessary to quickly establish planned conservation areas. At the same time, consider adding areas with potential resources and marine ecosystems into the planning such as Cua Roon Reef, Hon Mat Island or establishing self-governing community groups to protect ecosystems and biodiversity. local biodiversity.
For trainning
Contributing to training for 1 master, Nguyen Van Minh (Institute of Marine Environment and Resources)
International cooperation:
The project has enhanced the exchange and learning of new technical methods and technologies from a developed country through a joint survey and workshop with the Pacific Institute of Organic Biochemistry, Institute of Marine Biology of the Russian Academy of Sciences.

- Update the latest data on biodiversity in research areas.
- Identify economically valuable and rare species in the research areas. Among them, there are 66 species of seaweed and 78 species of benthic animals with economic value; 1 species of benthic animals, 11 species of fish, 11 species of coral are rare species on the Vietnam red list and 256 coral species are on the IUCN red list.
- Proposing the Cua Roon reef area to be included in the planning to establish a marine protected area or establish a self-management group to protect aquatic resources.

-  Publication: 02 domestic, 01 international journal and 01 book
- Diversity of Green Macroalgae Genus Ulva (Chlorophyta) in Hai Phong. VNU Journal of Science: Natural Sciences and Technology, Vol. 38, No. 3 (2022) 61-69
- Status and impacts to sea turtles in Vietnam. Vietnam journal of marine science and technology
Marine Floral Biodiversity, Threats, and Conservation in Vietnam: An Updated Review. Plants 2023, 12, 1862. https://doi.org/10.3390/plants12091862
- Book: Seaweed in the northeastern islands of Vietnam. Natural Science and Technology Publishing House. ISBN 978 04 3572094, 2023, 268 p.

The marine protected areas and island districts within the scope of the project can use the results to update on the status of ecosystems and biodiversity.

- In order to conveniently survey and collect samples in Vietnam's seas and not be greatly affected by weather factors and ocean waves, survey trips should be conducted from early May to June every year. Avoid the southwest and northeast wind seasons that create big waves and turbid water that will affect the quality of the survey trip and the ship's schedule.
- From the results of the task of proposing the Cua Roon reef area to be included in the planning to establish a marine protected area or establish a self-management group to protect the ecosystem, biodiversity and aquatic resources.