I have noticed that my yellow tang will turn the color of a blood blister in his central body area and up near his dorsel fin when he is stressed. How wierd is that?
Could very well be developing a blister. Some diseases show up as red blisters, then the skin will peel back from it. Or someone is hitting him pretty hard, leaving a bite or barb wound. Do you have any other tangs in the tank?
~~Colesea
