It looks like tiny little patches of fungus or some kind of parasites. The fish still has their vibrant color, still swims normally, doesn't eat, and breaths faster than normal. I just went to my LFS and he said he thinks it might be some kind of parasite like ich or cryptocaryon so I got "NO-ICH." I can put that right in the tank and it won't harm inverts, corals, or anything except parasites. I will see if it works the next time I get fish.