If you keep Midas in a pond, they are food hugger no difference from koi that will follow people for food. In a glass box, a koi will remain a food hugger but a Midas can mature from a food hugger into a banger due to limited territory. Mirror will exacerbate territorial behavior as the greatest threat is from its own kind. Though too light weight to be qualified as glass banger, mirror will trigger betta, paradise fish, Victorian Haps, and some MBUNA to attack glass. I’m taking back my listing of Oscar as an occasional banger. I think Oscar is too wimpy to be a banger but more a food hugger except in spawning.