i have 4 jack dempseys 2 i got that were about 2.5 inches when i got them and about 3.5 inches now, and 2 i got a couple weeks ago that are about 4.5-5 inches, there is also a 6-7 inch pike cichlid in the tank. the last couple days one of the little JD's has been acting strange he turned very dark like pure black and is fighting everything in the tank besides one of the other big JDs he even bosses around the big pike, he also seems to rub against one of the other big JDs alot could there be fry? i dont know why he would change from the one kind of being picked on to such an agressor in a just a couple days