Yesterday, I noticed that my lubbocks fairy wrasse which I have had for about a year now didn't come out at all. I searched around the tank, but still, could not find him. When i fed everyone in the tank, he pocked out of the rock, and i noticed he is missing patches of scales. I did find some blue circluar discs on my sandbed, which at the time i dicovered them, i had no idea what they were. I know know that they are his scales. Today, he came out to eat, but he has lost more scales. Why would he be losing his scales? thanks for the help