i have had to do alot of moving to keep alot of wrasses like that with each other..some of those i do not have anymore i took down my 180 and just have a 90 now with the laboutei, lineatus, possum, redfin, and yellowfin now..but i use a spiecmen cup when i introduc a new one to the tank from qt...i leave the new guy in there for a few days to let the other fish get use to him and then i let him out at night and it is like he was always there..every fish is different i have had a Scotts that was the most docile fairy i kept when they are know to be some of the most aggressive..the other i kept was just down right nasty...but if you can mix up sizes shapes and colors that will help alot in keeping alot of fairys