New records of Parablennius pilicornis (Cuvier, 1829) (Pisces, Blenniidae) along the Italian coasts

New records of Parablennius pilicornis (Cuvier, 1829)(Pisces, Blenniidae) along the Italian coasts are reported. Previous studies showed the species’ presence only in one site along the Western Ligurian coast and in three sites in the Gulf of Palermo (northern Sicily). On the basis of underwater observations, occurrence of P. pilicornis is here described in north-western Sardinia and in other sites of southern Tyrrhenian. These findings may represent a progressive expansion of the species to the whole western Mediterranean Sea.