I have three red tiger barbs, one albino and one green. (I had two green tiger barbs but the fool managed to wedge himself between the glass and a decoration and die). the red tiger barbs as well as the green one form a tight nit little shoal and do everything together, like darting about aimlessly from cover to cover and fighting among themselves, but the albino seems to exclude himself from the fun. He seems to enjoy staring off into space or watching my giant danios, and follows my red tailed shark around a lot. He still joins the other tigers whenever they decide to chase each other, but he definitely doesn't want much to do with the rest of the school. Is this normal behavior for an albino tiger barb? is this just his own personality showing through? Should I be concerned about this behavior? Thanks.