Nice gills, LOL. How long have you had the crocea and why is it gapeing like that?
Also might want to watch the two Derasas on the left. Clams will cover eachothers mantles something and shade the others mantle to get it to lose pigmentation and sometimes bleach out.
Other then that the corals are all healthy as heck looking. Some appear to be a little to close to other (I had a hammer that grew over to a Yellow Fiji Leather that I had and wiped it out).