Blacktail triplefin

Blacktail triplefin is a common name for several species of fish in the threefin blenny family (Tripterygiidae) and may refer to:


 * Enneapterygius bahasa, also known as the blacktail threefin, a species of threefin blenny known from reefs in the western Pacific Ocean
 * Enneapterygius nigricauda, a species of triplefin blenny
 * Enneapterygius similis, also known as black and red triplefin or masked threefin
 * Helcogramma aquila