Just noticed this on my new D’jardini Tang. Has been in my tank for only a week. The Clown Tang has been aggressive, e.g. posturing, swimming rapid circles around the Djardini and bumping into each other. The Djardini is a bit bigger and holds its ground. So this morning I noticed a little spot, which appears to be macular (not raised). He is acting great and eating very well. How can I tell minor apart from a disease that needs intervention?
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