So i've had my pbass(6) for a couple of months now and i just started starving them about 2 1/2weeks ago so i can get them on pellets. So far one turned and another one is following. They are about 3-3 1/2inches. The one first to turn on pellets grew larger than the others and now i just noticed that he's starting to chase them around the tank. What's the cause of this or what could be the cause of this? They never really were aggressive at each other. When they were smaller i seen them fighting but then it stopped. And now it's worst because only one guy is doing it. Maybe dominant male? Suggestions and help please.