Tripterygion melanurum is a species of fish in the family Tripterygiidae, the threefin blennies. It is widespread in the Mediterranean Sea, where it occurs around the Balearic Islands and off the coasts of southern Sardinia, Algeria, Tunisia, Israel, Lebanon, Greece, Cyprus, and southern Turkey. It is a marine subtropical demersal fish measuring up to 5.3cm (02.1inches) in length.