Enkele oude vondsten van exotische mossels op vaartuigen op de werf van ‘Wilton’ in Rotterdam

In 1961 living specimens of two exotic musselspecies were collected from the hulls of two sea-going vessels on a wharf in Rotterdam. Specimens of Perna viridis were encountered on a ship, which had spent some considerable time in the Indian Ocean, while examples of Brachidontes pharaonis were collected from a dredger, which had been employed in the Suez Canal, Egypt. These examples show how easily epibiontic molluscs are transported from one faunistic area to another. They may explain also finds of exotic species, dead or alive, in harbours.