Characters: Colonies are hemispherical to flat. Valleys are 12-15 millimetres wide, and are highly sinuous. Polyp walls have a moderately thick fleshy appearance and usually have a groove along the top. Colour: Brown, grey or green, either mottled or with walls and valleys of contrasting colours. Similar species: Symphyllia radians, which has larger and less sinuous valleys. Habitat: Upper reef slopes and fringing reefs. Abundance: Common