Characters: Polyps are oval and flat, with an arched central dome and a flat undersurface. The axial furrow is elongate. Primary septa are exsert on the central dome.
Colour: Pale brown or mottled.
Similar Species: Cycloseris patelliformis, which is not distinctly oval.
Habitat: Soft inter-reef substrates and lower reef slopes protected from wave action.
Abundance: Usually uncommon.