Anyone ever see behavior like this out of their Bangaiis? I've had this male for almost a year now and he does this from time to time. Sometimes I walk in to the room and see him displaying this behavior to his reflection in the glass, he also started when I was cleaning the glass just now. My best guess would be breeding behavior or a dominance display. He'll flash his colors, puff out his throat, open his mouth and shake his tail. I never see any aggression toward the other fish in the tank when he does this. Pretty interesting to watch. :) He's the only Bangaii in the tank btw, so he isn't holding.