I so far only have to damsel's in my tank one is really tough always bossing the other around. And what makes me laugh is when I walk up to my tank and I mean I put my face really close to the tank he just swims up to the glass and looks dead on. sometimes he tries to attack me by taking a nibble on the glass between us. I would move myself to the end of the tank and he follows. Its pretty cool. I would then try to scare him and he would run behind the rocks and then comes back to me. I think we have a pretty good relationship hehehe.