These guys are cool fish. Very active and really really fast. They eat anything that will fit into their puny mouths. They are not overly aggressive. Mine was harrasses to death by the cichlids I keep it with. It seemed to be a pretty fast grower in my tank, about the same speed as the Livinstoni it was housed with and got to 8 inches fairly quickly it seemed. It did not really back down to often but would get the crap kicked out of it by other fish.