Characters: Colonies are hemispherical, up to one metre across, and are flabello-meandroid. Valleys are 8-11 millimetres wide and have thin walls, only the upper part of which are living. Septa protrude up to 5 millimetres and are equal, with coarse teeth. Columella centres are irregularly spaced and distinct. Costae are fine.
Colour: Pale cream or green.
Similar species: Caulastrea tumida which has smaller fleshy polyps and forms smaller colonies which are not flabello-meandroid. Superficially resembles the mussid Lobophyllia.
