Wolf fish tank mates??

My Mala (common) wolf never bothered fish that were significantly larger than he was. He did occasionally bite my clown knife, but that was when the knife about his size. As long as the other fish are larger, you should be ok.

Arowana, most likely. The gar and the poly might be a problem since they both rest on the bottom of the tank.

Aside from occasional displays of aggression, the most violent thing my wolf ever did was kill a RTC that was probably 2-3" larger than him. I couldn't figure out why, but then I realized that all the other fish I've kept with my wolf, tended to swim in the middle to upper regions of the tank. Come to think of it, that's probably why my Knife got bit every now and then too. At least with my mala, as long as you stay off the bottom of the tank, and out of his way, he's usually ok. He's still by himself right now though, since I didn't want him murdering my 2 new FL gars.