Mytilopsis leucophaeata (Conrad’s false mussel), an invasive American bivalve, has been found for the first time in the Gulf of Gdańsk on hard substrata (PVC panels) deployed at depths from 3.5 to 6.0 m.
Department of Experimental Ecology of Marine Organisms, Institute of Oceanography, University of Gdansk, al. Marszalka Pilsudskiego 46, Gdynia 81–378, Poland