I know Just can't figure it out. He is still eating. Nothing is attacking him. He is with a Japanese leopard shark White spotted bamboo shark. Coral catshark. Blue dot stingray. Blue jaw trigger. Yellow tang blue tang. Blonde Naso tang. Lion fish. Red stripe squirrel fish. Zebra eel. Blue tang one spot foxface. Bicolor fox face. Lunar wrasse. Axil wrasse. Sailfin tang. Sand star. African Red Sea star. Duncan corals. Mushroom corals. Sun coral. Gorgonian coral. 500lbs of live rock. 800lbs of live sand. 200 crabs and snails. Parameters are good. My nitrates are at 20 but stay there most of the time. Sometimes dropping around 5 maybe 10. But almost always in that range. Nothing else is having problems just him. I have had him for a month and he has been like this for three weeks now. Not sure what it is.