Characters: Colonies are massive, less than 0.5 metres across and usually flattened. Corallites are rounded, with thick walls, and are 10-15 millimetres diameter. Septa of living colonies have rounded, bead-like dentations. Colour: Browns and greys, usually with differently coloured corallite walls and centres, commonly with radial stripes. Similar species: Mussismilia braziliensis. Habitat: Shallow water, tolerant of turbid environments. Abundance: Common.