Plagiotremus rhinorhynchos (blue striped fang blenny)
This fish changes color, the change has already begun on the fins and from the snout back
http://species.fishindex.com/species...orhynchos.html http://filaman.uni-kiel.de/Summary/S...ry.cfm?ID=6071 
This is not considered the false cleanerfish (Aspidontus taeniatus).