An additional record of one of the most successful lessepsian migrants in the Mediterranean, Fistularia commersonii (Osteichthyes: Fistularidae), indicates the spreading of this species in the Adriatic Sea. This is by far the only lessepsian migrant with multiple confirmed records, separated in time and space, for the Adriatic. Its fast spreading is followed by rapid population explosion at invaded areas and potential effects on the local fish fauna are emphasized.