ah, I didn't realize there was a sailfin wrasse
Flashers will get along with all wrasses, except the same kind of flasher. There are exceptions, I had a jerk carpenter once. Fairys are different matter. here is the sticky link about wrasses
Introduction My name is Hunter and I am a wrasse addict. Admitting such is the first step to buying another wrasse, I think. Wrasses are not only my passion, but my niche in this hobby since 2010. My tank is full of them, and unfortunately “regular” species are no longer exciting enough for...
www.reef2reef.com
Also - always use an acclimation box for at least 3 days when introducing any wrasses together.