I've noticed for about a week now that my Melenarus wrasse has had a large dark brown spot on his skin. It does not look like a growth. It doesnt protrude from the surface of the skin; more like a discoloration. It looks to big to be black ich to me and it has not grown at all or spread. Ive been observing him and today he was flashing a lot against the rock and in the sand. I have a rock boring urchin in my tank with with long spines. Could it be a puncture wound from one of the spines?