Plagiotremus phenax

{{Short description|Species of fish}}

{{Speciesbox

| image = Imposter fangblenny (Plagiotremus phenax) (41734730610).jpg

| status = LC

| status_system = IUCN3.1

| status_ref = {{cite iucn |author=Williams, J. |author2=Smith-Vaniz, W. and Hastings, P. |date=2014 |title=Plagiotremus phenax |volume=2014 |page=e.T48342412A48403822 |doi=10.2305/IUCN.UK.2014-3.RLTS.T48342412A48403822.en |access-date=20 November 2021}}

| taxon = Plagiotremus phenax

| authority = Smith-Vaniz, 1976

| synonyms =

}}

Plagiotremus phenax, the Imposter fangblenny, is a species of combtooth blenny found in coral reefs in the Indian Ocean. This species reaches a length of {{convert|8|cm|in}} TL.{{FishBase |genus= Plagiotremus|species= phenax| month = February | year = 2013}} This blenny uses bio mimicry to avoid predation, as it has a strong resemblance to the disco blenny (Meiacanthus smithi).{{cite book | author = William Smith-Vaniz | year = 2007 | title = Saber-Toothed Blennies, Tribe Nemophini (Pisces: Blennidae) | publisher = Academy of Natural Sciences | isbn = 978-1422319253}}