It was several months ago and I can't remember the color it was when we first tried catching him (we had to dig through the gravel to scare it up first) but I do remember it being that pale when we caught it finally and pretty much ever since I've had it. So I'm not positive it started this color, but it has stayed this color for certain. Even when there is no reason for it to possibly be stressed, and none of the other Kuhlis are discolored so it's not likely anything in the tank. The parameters are all good and they get 50% weekly water changes.