Thanks guys!
headbanger_jib
I wouldn't say he's a beast just yet. He's at that 8-9" mark at the moment. I can't wait until he crests that 12" mark and really fills out!
Peaceful might be a little bit of a reach. I think there is an understood mutual respect between fish in my tank. Almost every fish is super aggressive in its own right, but everyone behaves. The aimara is a hair over 7" and my dats range from 8-12".
Believe it or not, the aimara is pretty well behaved with my mid swimmers. He and my tigrinus go at it sometimes. I was actually concerned because the catfish stopped eating for almost two weeks following one particularly bad fight. But things have been calm for a little while now so I think they worked out their differences.