The alien mollusc Aplysia dactylomela is recorded for the first time from the Egadi Islands marine protected area (western Sicily). This species has been widely reported in the Mediterranean and has established populations in Sicily. The presence of a few specimens let us suppose that its occurrence in this area is a recent event and that soon new populations will be sighted in the whole Egadi Islands and on the western and southern coasts of Sicily.

The crab Percnon gibbesi and the mollusc Aplysia dactylomela are recorded for the first time from the Taranto Gulf (Italy, Ionian Sea). Both alien species have been widely reported in the Mediterranean and have established populations in Greece and Sicily. The presence of a few specimens induces us to think that only lately these two species expanded their distributional range and that new stable populations will probably soon settle in the whole area.

Aplysia dactylomela is widely distributed in the Atlantic and Indo-Pacific, but has not been recorded in the Mediterranean. Recently, underwater photographs of this species from the eastern Mediterranean were posted on Internet forums. The Mediterranean coasts of Turkey were screened for this species and two alive individuals were encountered. This study constitutes the first record of this species from the Turkish coastline and provides enough evidence that Aplysia dactylomela is spreading in the Levant Basin.