Colonies are massive or form thick plates. Corallites are foveolate (funnel-shaped) and immersed in the coenosteum so that the opening of the corallite is at the base of the funnel. The coenosteum is fine. Tuberculae and papillae are absent.
Usually pale brown, blue (which may photograph pink) or cream but may be brightly coloured, sometimes with bright blue or green tentacles partly extended during the day.
Most reef environments.
Seldom common but relatively distinctive.