HELP! Giant Red Spot

[FunkeFish]

I have a regal tang and a yellow tang. I have been feeding them garlic b/c the regal has ich. The yellow tang now has a giant red spot in the center of its body that can be seen from both sides of the fish. The only thing I have done differently is fed garlic. I have had the fish for approx. 1 month and the yellow tang otherwise looked healthy. What is it?

[chris.hampton]

I can't help but a pic wil help other people to see what it could be

[hansonfam]

If you go to the fish disease and treatment forum there is a thread at the top of the page on red streaks and blotches on tangs.

Good luck

Lisa