From 25/2 to 1/3/2019, Professor Andrzeja Górniaka from the Department of Aquatic Biology, Faculty of Chemistry and Biology, University of Bialystok (Poland) visited and worked at the Department of Oceanography. , Meteorology and Hydrology. During this time, Prof. Górniaka presented a seminar on “Hydrochemical and biological in the fresh water and ocean”, attracting many students to participate. He also had discussions with the Department on the opportunities for cooperation in the near future. In addition, he made a field trip to the Mekong Delta for further research.