This just showed up on my clownfish in the last few days, Im thinking it may be Lympho. It seems like it may be bothering him as he seems less active than he used to be. He has been in my tank for about years and still is eating very aggressively when I add food. I must say, I think he is going senile, I have about 3 LTAs and one large RBTA and he seems to have taken a liking to a nice bed of GHA that is growing. While I do have a trace amount of phosphate (yes I am working on it), it is nowhere near enough to affect the fish, all SPS corals are doing great. Any thoughts would be greatly appreciated: