Damsels typically are bastards. Chromis typically aren't and some like yellowtailed blues, talbot's, and few others are usually "okay" in non-nano tanks (55 and up) as long as tankmates are chosen carefully. As for ones you can count on being evil, at least in the long run, are velvets, blues, scissortails (yellowtailed black), reticulates, s.majors, striped, and dominos.
