The 55th European Marine Biology Symposium is postponed. It is expected to be rescheduled for summer/autumn 2021. The 55th European Marine Biology Symposium will come to Poland and will be held at University of Gdańsk between August 24-28, 2020. The conference will address four main themes: (1) Main stressors and their impact on ecosystem health, (2) Marine molecular ecology – new tools and new findings, (3) Diversity and physiology of marine organisms. Is there still anything to discover? and (4) Marine living resources – environmental significance. The symposium will traditionally attract students and scientists at different scientific career stages representing various European and non-European research and educational institutions, national and international environmental agencies, working groups (e.g. ICES, UNESCO) and European networks such as MARS, EuroMarine and EuroOcean.