i have 3 damsels, a blue, a yellow, and a 3 striped. blue and yellow damsels are peaceful, the 3 striped damsel, well his name is bull... i think you get the picture. he is very territorial. if you are getting damsels, add them to the tank last! that's my best suggestion for you (if only i had known that before i added mine). great fish though, very hardy and long living.