i have a yellowtail, blue devil, a clown, and an unidentified species of damsel(i cant find it anywhere). they chase eachother a little but no one goes missing any fins. they dont mess with my puffers or lemarks angel. i did try to add 2 chromis and one died overnight and the other died two days later and i think the damsels did it cause they were the only two fish i had that died. the puffers dont mess with anyone and the damsels just mess with eachother looking like they are almost playing tag but like i said no fins missing at all. you could try the chromis but from my experience i would say no to them mixing well. and needless to say i havent tried chromis since and dont plan on it.