I just got a walking catfish thats about 18" and put him in with my florida gar and silver arrowana which are both a bit bigger than him. I thought he would be kinda lazy and not bother the other fish but he seems active as ever. Had some quick questions about them like should they have a cave to hide in and are they known to be aggresive towards tankmates?
But I just recently acquired a new one and he eats like a monster. He pushes my 9" Oscar to get some food. He's about 6" now. I have PVC pipes for all the fish to hide and play in. I think most fish like hiding places. 