I’ve noticed that the Skeleton on my purple bubble has been receding recently ( 1st pic ) and I’ve noticed that white circular thing with a hole in it growing below it ( 2nd pic ) not sure what that is but is it dying? I’ve already lost a green bubble awhile back and I’ve had this one for around 2 months now, its fully open during the day and tbh after my female clown hosted it 2 weeks ago it seems to be opened more than ever! My params are all stable and I don’t have any issues so far with my other coral. It does seem to be not as dark purple in coral as when I got it from the store because I think it might be bleached because when I first got it my lights were quite high I’m sure and I’ve lowered them since because of a torch that bleached not long after I got it, but it’s just recently that I’ve noticed the skeleton receding. Any help would be greatly appreciated as I don’t want to lose this coral!