The Solitary Disk Coral (Scolymia cubensis) is a solitary marine (saltwater) stony coral in the Mussidae family. It is not a plant.

The Solitary Disk Coral is flat and concave with a circular shape, like an inverted cone. It can be light-green, beige, or deep rusty red. It has layers of thick plates called septa that surround a central mouth with spongy polyps.