Right now i have a wolf in witha sveni pike and a few other fish in a 75 and my wolf is scared of everything. Also i have a 2 inch convict in there too and it swims right by the wolf and he could care less. Depends on the fish tho
due to its aggressive nature most suitable to be kept alone, they can however be kept with other large fishes that are able to stand their ground against this large aggressive species.