i successfully kept a red wolf with misc. sa/ca cichlids, silver aro, misc. catfish in a
150g tank. BUT all fish were not full grown the wolf was about 6".
From what I know...anything that is the not able to be eaten. Red wolves are aggressive to each other but other fish the same size or bigger should be fine...good luck...
i kept my red in a similiar set up to Mud's, no cons or dovii though. also kept one with three gold wolffish. never had a problem from the red with any tankmates.