Thanks for the input! A little more about him, searching through the internet I found some video of similar looking fish as Brycon Dentex but they seem to have a longer mouth and mine is shorter, but then again videos online can be deceiving. As far as his temper, he is in a 125 with some smaller fish and some bigger robust fish ranging from 16" silver aro, (2) 4"+6" flowerhorns, (4) 5-7" parrots, 18" black shark, (2) 7-8" severums, 8" syn, (3) 8" plecos, 5" raphel cat, 4" blue gourami, 3" leopard danio, and he hangs out and gets picked on by the smallest fish in the tank the leopard danio lol. the leopord danio is about 3 inches and the "sabalo barracuda" is about 6-7in. from what i read, Brycon Dentex is a mean fish. Maybe I lucked out, he is too young that aggression hasn't come out yet, or possibly different species?
FOR THE FLAMERS, I KNOW MY TANK IS OVERSTOCKED BUT IT WORKS FOR ME!