I agree if you want a better chance at having the perfect arowana get the black. I have had 2 silvers that had multiple defects like lower jaw protrusion, drop eye, and crooked jaws. my black is around 14"+ and he has no defects at all. Also my black is the most well tempered aro I have had when it comes to tankmates but I think that is just luck. The black is a more sleek fish and doesn't get as bulky which I prefer and personally I like the color of my black better that all 3 silvers I have had.