Yellow Tang with red splotch
I have a yellow tang in quarantien and tonight I noticed a red region on what I would call her forehead. It is the area above and between her two eyes.
It looks sort of like a sunburn. Very red (the picture only hints at how red), but she is eating just fine. She has been in there for 11 days with no trouble. All water parameters are perfect.
I had been feeding her nori which she loved, and then I switched to Sprirulina flakes to see if she would take those, and stopped the nori. She has been on flakes for about 5 days.
I just gave her some nori thinking it might be malnutrituion.