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I read somewhere that it might be stress or cooral toxins but idk man..im doing my water change tomorrow but other than that idkClearly something is off, but it's really hard to tell what is actually on the fish and what is a product of the camera/lights... Can you get a few pictures with some white/standard room lights, by chance?
That's a juvenile Caribbean Blue Tang (Acanthurus coeruleus), not a Yellow Tang. The small spots look like ich with possibly some lymphocystis on the anterior portion of the dorsal fin. The blotchy white areas are likely due to stress.
any suggestions on what to do?any suggestions on what to do?

