Did you just buy that Umbrella Coral? It looks like they had 'glued' a small frag of 'something' on the rock rather than it being a 'growth'. That 'something' looks like it could be a small piece of Leather Coral?
If that’s the case then that is a 2 for 1 deal i just got which is awesome lol but yes i purchased about a week ago. The purple stuff that resembles barnacle to me also seems to “breathe” . What is it???