Mine was very shy at first and a little skittish. It changes colrs when stressed and at night will camoflage itself against any background. He eats like a pig too. I put algae sheets in daily and it can't resist it. He also eats flakes, pellets, mysis, brine, shrimp, clams or anything else that gets tossed in the tank. Mine was also a survivor of an ich breakout I had a year or so ago. It had popeye along with it and stayed hidden and didn't eat for over 2 weeks and then one day came out to eat like nothing had ever happened. Very hardy fish.