Enneapterygius signicauda

{{Short description|Species of fish}}

{{Speciesbox

| status = LC

| status_system = IUCN3.1

| status_ref = {{cite iucn |author=Williams, J. |date=2014 |title=Enneapterygius signicauda |volume=2014 |page=e.T178928A1548899 |doi=10.2305/IUCN.UK.2014-3.RLTS.T178928A1548899.en |access-date=20 November 2021}}

| taxon = Enneapterygius signicauda

| authority = Fricke, 1997

| synonyms =

}}

Enneapterygius signicauda, known commonly as the flagtail triplefin, is a species of triplefin blenny in the genus Enneapterygius.{{Fishbase|Enneapterygius|signicauda|month=April|year=2019}} It was described by Ronald Fricke in 1997.{{Cof record|spid=64804|title=Enneapterygius signicauda|access-date=20 May 2019}} This species occurs in the western Pacific Ocean and has been recorded from American Samoa, southern Tonga, and Vanuatu, as well as southern Japan.