Lymphocystus is common virus among larger angelfish such as Pomacanthus, Holocanthus, and Euxiphipops. Your juvenile Blue Angel or Queen (the pic is too fuzzy) should be captured and the spot gently removed by hand. Offer vitamin enriched food, use Selcon or similar, and maintain the fish in...
Lemonpeel angels love LPS corals especially Trachyphyllia sp. Almost all Centropyge angels will nip occasionally at SPS corals. I dont think it is a species thing, just the fish itself. I have seen Flames in some aquaria go to town constantly on Montipora and Acros, where in other aquariua...