Tank is a 55 gallon. It really is too bad, the sev shows great coloration when its not stressed out like this. I also have in there a 4" male Firemouth which doesn't get picked on at all and shows great coloration as well but won't sit still for a picture. A 7'' L203 panaque, three giant danios and one unsexed 2.75" petsmart "trimac". The flowerhorn (or whatever it is) doesn't show alot of coloration either, mainly dark brown to black but does not take any abuse from the GT. I know I cannot house him in a 55 with a GT forever, but I couldn't resist seeing for myself what one of these fish turn out to look like.