Western Mediterranean & Adriatic, and other places along the european coasts where mussels are farmed: sea of Azov, Galicia, Arcachon basin, Morbihan gulf, Wadden See… The species is known from the western coasts of the British Isles, and is invasive in western South Africa or in pacific coast of north America. It is farmed in Japan, E. China and New Zealand. The “Black Mussel” lives in dense colonies, attached on intertidal hard substrates, down to the lower photic zone and maybe deeper: « 50-80m deep » in a spanish data from my collection. Filter feeder.