JennM;1097833 wrote: I don't think it's a stunner (Echinopora sp.) I had a massive one and it didn't have the striations like that.
Looks more like Echinophyllia to me. Also commonly called a 'chalice' but a lot of genus fall under that common name.
The coral known as "Hollywood Stunner" is Echinopora sp.
Jenn