Do you have a better picture of the crown? It seems more like a regular brown toadstool leather in the photos. Plus the polyps don't appear to be from a Sarcophyton elegans. Here's a picture showing both:
I'll try to get a better picture of the leather. It was sold to me by Absolutely Fish in Clifton, NJ as being a Fiji Yellow Leather....Maybe I got jerked:theyareon ......