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.
Taxonomic Note: Taxonomic status of the nominal species Symphyllia hemispherica Tennison-Woods, 1878 needs further study.