This is just one variation of the Lubbock's Fairy Wrasse from Liveaquaria. I have seen others and they tend to have more color that the one you posted not the promanant strips. Though, I am not saying it couldn't be a Lubbocks with so many color variations from different regions. Most Flashers however do tend to have markings like this. What does its dorsal fin look like? There is a distinct difference between the dorsal fin of a Flasher and a Fairy wrasse.