I have 3 Blue/Green Chormis' and two are doing VERY well....always eating and growing pretty fast. The third Chromis is really struggling badly. The others are constantly nipping at him and swimming in front of him (trying to bully him into mating????) shaking rapidly (like male guppies do when trying to mate) then turning around and nipping at him. I am worried he is going to die as he now has a red dot near is face.