get him small that will help him adapt to neing with other fish. You can do cichlids as long as aggression isnt bad. I currently have a 4 inch red wolf housed with a large red head cichlid, venny pike, redtail barracuda. Thats in a 75 until my 150 goes up. It all depends on the fish really. I had a big mala wolf in the same tank with cichlids and he did fine but i wanted him to have a bigger tank so I sold him