My AT (American Tiger Datnoid) owns my current 150 but that might change when my 220 gets here...
But my fast growing Oscar same size as my AT atm likes to challenge the AT, only to get beat down lol....
Last night they were doing their little back and forth dance, the oscar would try and scare the AT by moving in with his mouth open my AT would move in on the oscar, and the oscar would run. Then when the AT was going back to his driftwood the oscar attacked from behiend... Which is a no no lol, my AT turn around and chased the O at full speed and rammed him (it was pretty loud).... Then 5 seconds later they are swimming side by side, so I guess as long as everyone knows their place there will be peace...