Ya, My midas bucks like **** at my other fish, except the Dovii.
He can't touch the africans.
They're too fast.
He did beat the LIVING **** out of my Red Devil though.
Sometimes if they all grow up together they're ok.
SOMETIMES.
It will depend on how big the oscar is to the midas. If the oscar is bigger you could have 2. The temperment of the fish will determine alot of things so just keep your eye on the new midas. I have had Midas in with oscars and there was no problem.