I've had both. For the flashers, I had the carpenter flashers. IMO
it's best to have 3 of them to get the most our of the beautiful flashing display by the males. Thing is, 2 females would be better IMO
, since one female might get harrased too much. They are also jumpers. My 3 changed to one female left. 2 jumped and the solitary female just died one day after more than a year in the tank. I did have a single fairy, the pencil wrasse (rainbow colored). It lived for about 3 months and died one day. Did notice it had a very small mouth. It would not eat anything but frozen or live mysis or brine shrimp. Was very secretive also and only came out when feeding time or at night. The carpenters ate everything.