The black-faced blenny (Tripterygion delaisi) is a species of fish in the family Tripterygiidae, the threefin blennies. It is widespread in the eastern Atlantic Ocean and the Mediterranean Sea from the English Channel to the coast of western Africa as far south as Senegal. This species is up to 6 centimeters long. It lives in crevices at depths of 5 to 40 meters. It feeds on micro-crustaceans. When threatened it freezes rather than swimming away, relying on its cryptic color patterning to disguise it against the substrate.