does anyone have a picture of a yellow tang with lateral line erosion? i have noticed that the yellow tang I have had for 3 weeks is "discolored" like a brownish color around the eyes and face. It seem to have enlarged pores or dots extending down the back though. eats great, swims great, etc. Is this normal coloration or sign of a problem? I feed 2x day (frozen salt water multi pack) with algea sheets attached all day (changed 3x day). any ideas?