Fulvia fragilis (Forsskal in Niebuhr, 1775) (Bivalvia: Cardiidae), first record of an alien mollusk in the Gulf of Thessaloniki (inner Thermaikos gulf, North Aegean Sea, Greece).
The occurrence of the exotic bivalve Fulvia fragilis (Forsskal in Niebuhr, 1775) is recorded for the first time in the Bay of Thessaloniki (inner Thermaikos Gulf, North Aegean Sea, Greece) with no previous sign of the species in the North Aegean Sea. A total of 45 freshly dead specimens, stranded after a storm, were collected and registered in the author's collection while many others were left in place. The occurrence of this alien species in close vicinity to the port of Thessaloniki is an additional incidence of its presence in areas related to shipping activity in large harbours (Izmir, Piraeus, Malta port, Ebro delta, Syracuse). This indicates that F. fragilis is primarily dispersed in the Mediterranean Sea via shipping. Control over ballast tank evacuation could also con fine the dispersal of this Lessepsian species in areas, which are inaccessible via natural ways.