i recently bought 3 new pbass...(said that too many times)...i purchased 3 because....somethin about a pack and they were 6 dollars each. it looks as if i have two that are the same type and one that is another type. or it could be that it is just really stressed it looks different. They are about 3 inches and the two swim freely while the one hides by the heater and if he comes out he gets chased off. he has to be extremely sneaky to get any food. could it be that the two paired off? toooooo early for that??? different type??? female?? somethin??