The International Conference "Environmental Toxicants in Freshwater and Marine Ecosystems in the Black Sea Basin", organized by the Hellenic International University in . Kavala, Greece and the “Lower Danube” University of Galați, Romania, within the BSB 27 MONITOX project. In the context of the current epidemiological situation in the world, caused by COVID-19, the conference took place online, with broadcasts from Greece, Romania and the Republic of Moldova.