I have had one blue devil damsel for 8 months in my 90 gallon reef tank and it has never bothered any other fish I have until yesterday when I bought two more blue damsels and a strawberry fish. It has killed all 3 of my new friends. What I'm I to do now? The 3 fish only costed me 17.oo. I'm afraid to put any new ones in. Should I get rid of this one damsel? I also have a blue velvet damsel. That one seems to be ok with the new fish I put in. Last month I put in a yellow tang and no one bothered it. Help! thanx