I bought my black rhom in Aug. and he was only 2.5 inches. Now its 4 months later and he has never been a finger chaser, but all of a sudden last week he started chasing me when I walk by his tank. If you put your finger up to the tank he will go to his corner or just swim away. Its really funny because when you walk up to his tank he wont do anything but as soon as you walk away he chases you from behind. Does anyone else have a black like this? By the way , hes only grown a half inch in four months.