Investigate, identify parasites causes disease in some economic marine fishes in the coastal from Quang Ninh Province to Quang Binh Province. Assess the role of pathogens and the harmful of parasites to the marine fishes.

- Theoretical results:
+ Found 200 parasite species from economic fish species in coastal North Vietnam belong to 123 genus, 63 families, 21 orders, 12 classes and 6 phylums, including: Protozoa - 18 species; Cestoda – 7 species; Monogenea - 62 species; Trematoda - 42 species; Nematoda - 27 species; Acanthocephala – 12 species and Crustacae – 32 species.
+ Four new species have been reported: Metahaliotrema similis n. sp.; M. ypsilocleithrum n. sp.; Loxuroides pricei n. sp. and Paucivitellosus vietnamensis n. sp.
- Applied results: Identified the dangerous parasite species that caused disease in coastal North Vietnam and the potential risk of affecting the coastal fishery.

- Discovered and published four parasite species new to science, many parasite species added to the fauna of marine parasites in Vietnam;
- Provides morphology data of some parasite species and genetics of 5 parasitic trematodes (registered on GenBank) in marine fish;

- Scientific papers in referred journals (list):
1. Nguyen MH, Nguyen VH, Bui NT, Ha DN (2016). Two new axinid species (Monogenea: Axinidae) from the Pharao flyingfish Cypselurus naresii (Günther) (Beloniformes: Exocoetidae) in the Gulf of Tonkin off Vietnam. Syst Parasitol (2016) 93:387-394 (bài báo SCI)
2. Kritsky DC, Nguyen VH, Ha DN, Heckmann RA (2016). Revision of Metahaliotrema Yamaguti, 1953 (Monogenoidea: Dactylogyridae), with new and previously described species from the spotted scat Scatophagus argus (Linnaeus) (Perciformes: Scatophagidae) in Vietnam. Syst Parasitol (2016) 93:321-335 (bài báo SCI)
3. Nguyen Van Ha (2015). An updated list of acanthocephalans (Acanthocephala) from animals in Vietnam. J. Biology, 37(3): 384-394
4. Kazachenko V. N., Kovaleva N. N., Ha Duy Ngo, Nguyen Van Ha, Nguyen Vu Thanh (2014). Redescription of three calidid species of the genus Caligus Müller, 1785 (Copepoda: Caligidae), parasites of marine fish Decapterus sp. (Perciformes: Carangidae) from Tonkin Gulf, Vietnam. Tạp chí Sinh học, 36(1): 1-11.
5. Nguyễn Văn Tăng, Nguyễn Văn Hà, Hà Duy Ngọ, Phạm Văn Lực (2015). Kết quả nghiên cứu tình hình nhiễm sán lá ký sinh ở cá biển ven bờ từ Hải Phòng đến Quảng Bình. Báo cáo Hội nghị Ký sinh trùng học toàn quốc lần thứ 42. Nxb KHTN&CN, tr. 249-255.
6. Nguyễn Văn Hà, Nguyễn Văn Tăng, Hà Duy Ngọ, Ông Vĩnh An, Lã Thị Loan (2016). Mô tả hai loài sán lá (Trematoda: Opecoelidae) ký sinh ở cá mú vùng vịnh Bắc Bộ, Việt Nam. Báo cáo Hội nghị Ký sinh trùng học toàn quốc lần thứ 43. Nxb KHTN&CN, tr. 82-86.
- Technological products (describe in details: technical characteristics, place):
1. Data on the parasites of marine fishes: Information of parasites (Morphology, host, locality, location, etc…) were saved by PDF file in Department of Parasitology (Institute of Ecology and Biological Resources).
2. Specimen set of parasites, include staining slides and specimens in ethanol and formaline, were saved by PDF file in Department of Parasitology (Institute of Ecology and Biological Resources), used for research, study and scientific exchange and cooperation.
- Other products (if applicable):

1. Nguyễn Văn Tăng. Has successfully defended his PhD. thesis in 2016.
Thesis name: Research on parasitic trematodes from some marine fishes in the coastal from Quang Ninh Province to Quang Binh Province.
2. Lã Thị Loan. Has successfully defended her master thesis in 2016.
Thesis name: Study on the parasites of the grouper in the coastal Dien Chau district, Nghe An Province.