Trust he is about 9-10" at the moment, and absolutely no aggression at all. I have had him for about 2 months, at first he would not take dead foods due to the fact that he was fed live foods at the lfs, but after about 3-4 days he ate some frozen shrimp. I feed him cut up fish peices and frozen shrimp, he won't eat pellets at all.
My problem is not that he dosen't eat, it is that he does not seem to eat much for a fast and big growing fish. He eats just enough to make his stomach bulge just a little. I have fish half his size that eat the same amount as him.
Thanks for the info Fugu, I did not know that about nile perches, but I still think he should be eating more.
I hope he is not dud fish???