Originally Posted by fishrfreinds
That sounds like me after my damsels killed my six-line wrasse... after they killed both lawnmower blennies.
I bought an established 125gal reef tank and 2 blue damsels and 1 yellow tail damsel came as part of the inhabitants.
They didn't seem to bother their current tankmates too much so I left them alone.
But whenever I added any new fish they harrassed them mercilessly.
They killed the fish I mentioned above and gave my Royal Gramma a nervous breakdown... she ended up jamming herself behind a powerhead, scared to bits to come out to feed until I trapped the damsels and moved them to a 10gal QT.