I did a search on these boards for hidden cup coral and didn't see anything like this. The most distinctive thing about the shape is the smooth flat top with all the polyps around the periphery.
Thanks for trying Carole! BTW, I'll be in Orlando for a wedding the end of next month. Do you know anywhere I might be able to get some pulsing xenia? The local stores don't seem to have it and I know it doesn't ship well. I would hope to pick it up on the evening of June 26th before my return flight the next morning.
Sorry for hijacking your thread bsktmom!