I would say from personal experience, Oscar's are number 1, my Red Devil twins are numbers 2 and 3 and my Green Texas is number 4. All super smart fish, and real glass bangers too.
cichlidinsomniac;3321275; said:my "red isletas" most amph. sp. are highly intelligent and interactive

That sounds like my old Midas, he would do the same thing. He'd come up to the corner to eat from me or attack anybody else if they got near...superleggera123;3321263; said:i agree midas madness.. my jag is intelligent cause he knows me.... and is happy when he sees me.. anyone else and he starts flaring up