Characters: Colonies are large and hemispherical or encrusting. Valleys are usually long and sinuous but may become short, with 1-3 centres and form Hydnophora-like (Merulinidae) monticules. Septa are exsert, equal, and finely toothed. A fine ambulacral groove occurs along the tops of walls. Tentacles are extended only at night.
Colour: Walls are brown or grey with valleys the same colour or green.
Similar species: Manicina areolata. Valleys are similar in size to Oulophyllia of the Indo-Pacific. Diploria species have smaller valleys and skeletal structures.
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