Characters: Colonies are thick plates up to 300 millimetres across, which usually slope downwards, parallel to steeply sloping substrates. Small upgrowths sometimes occur but are seldom the dominant growth-form. Corallites are mostly monocentric or form short radiating valleys towards the colony margins. Walls are low, broad and evenly rounded.
Colour: Orange- to greenish-brown.
Similar Species: Superficially resembles Goniastrea pectinata more than other Merulina.
Habitat: Crevices usually below 10 metres depth, silted slopes and lagoons.
Abundance: Common, but less conspicuous than other Merulina.
Taxonomic Note: The generic designation is doubtful as there are substantial differences between this species and other Merulina.