I have a yellow Tang who has what looks like welts. They are the same color as his body and do not seem to cause him any discomfort they are approximately 2 mm by 2 mm any suggestion.
They were only on one side of his body with one even on his dorsal fin but now only one bump remains? All I can think is that he brushed up against one of my soft corals and had a reaction but that is a total guess.
