Northern yellow-black triplefin

The northern yellow-black triplefin (Enneapterygius gracilis), also known as the northern Australian yellow-black triplefin,^[2] is a species of triplefin blenny in the genus Enneapterygius.^[3] It was described by German Ichthyologist Ronald Fricke in 1994.^[4] It is a tropical blenny, endemic to northern Australia, in the western Pacific and southeastern Indian Oceans.^[3][2] It is a non-migratory species which dwells in shallow tidal pools on coralline rock and in seagrass, and has been recorded swimming at a depth range of 0–15 m (0–50 ft).^[3][2] Male northern yellow-black triplefins can reach a maximum length of 2.8 centimetres (1.06 inches).^[3][2]

Northern yellow-black triplefin
Conservation status
Least Concern  (IUCN 3.1)[1]
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Blenniiformes
Family:	Tripterygiidae
Genus:	Enneapterygius
Species:	E. gracilis
Binomial name
Enneapterygius gracilis Fricke, 1994