I have had a very healthy Atlantic blue tang for at lease 6 months. Today I get home and he is very pale and a bit spastic. Breathing more heavily than usual. I fed rods food and he ate very very well. Other than the coloration he looks fine, just really pale. All other fish, corals and inverts are fine. Water quality is excellent. I was afraid he may have gotten into our anemonee. We just gotit 2 weeks ago. It us a large 6-8" bta. I cut the lights off for the night to help calm him... no ich signs or anything else.