I have had a pair of tank raised occellaris clowns for about 6 months now and they have been healthy fish ever since I bought them. I went out fo town for the weekend and came back to find that they each have a few black spots on them. There are probably 6 or 7 spots on the dominant female and about 5 spots on the smaller male. The black spots are not small like ich. They are probably about the size of the point on a ball point pen. I have never seen anything like this before. What is the problem and what do I do about it?