NOooooooooo
I bought a young oscar, maybe 4'', and everything was fine until he got around the 8 or 9'' mark. Then we'd look over and see him attacking our fish. I wasn't overly alarmed - he didn't have teeth, but the more he kept it up the more I started to worry about jaw strength. He crossed the line when he picked up my Ansorgii and tried to carry her across the tank like she was a rawhide bone he wanted to chew on. At that size, he was still the shortest fish in the tank, but he picked on them anyway. My oscar had to go byebye... I wouldn't let it mess with my bichirs for one more minute.
Keeper*