Last week I added a 'psychedelic' Mandarin to my reef community. The tank is about 8mos old with a fuge and lots (I mean LOTS) of pods. He's been eating fine (and continues to) and has no problem finding food. He's acting normally, no one is harassing him and overall he seems pretty happy bopping around the tank and snapping-up goodies as he goes. This morning I noticed that his colors are faded. He's still acting normally and eating and otherwsie looks fine. What could this be a sign of?