It is a nice looking chalice, have two similar but without the green bumps. There are unnamed chalices like Ostentum said. Echinophyllia, Mycedium, Oxypora, Pectinia, Physophyllia, Echinomorpha (all part of the family pectiniidae); and Echinopora (part of the faviidae family)are the genera. A lot of the mycedium fall into a general "alien eyes" category, with pronounced eyes all angling towards the outside rim. I would guess this as an echinopyliia, but can't help more than that.