My once very vibrant yellow Auratus has now changed to a dark purple/brown/green. First i thought that maybe it was just a color change based on his mood, but he has yet to change back to his former brite yellow and white and it has been two weeks. I tried to take a pic but he is so shy. Its a total body color change. His white is gone except for his tummy between his fins. He dosn't act sick, he is very shy though. I have had him since he was less than half and inch and now he is like 3 inches. Any one got any ideas?