Characters: Colonies are massive, usually hemispherical, up to 0.8 metres across. Corallites are circular, and vary in size according to stage of growth. Mature corallites are 6-8 millimetres diameter, crowded and open, with a neat appearance. Septa are neatly arranged in two alternating orders. A paliform crown is formed from 6-8 septa. Columellae are small. Colour: Uniform grey, pinkish-brown or orange with pale oral discs. Similar species: Does not closely resemble any other Montastrea. Plesiastrea versipora has smaller, less compact corallites with thicker walls. See also Plesiastrea devantieri. Habitat: Shallow reef environments. Abundance: Rare.