Characters: Colonies are compact branches with flattened tops. Corallites are deeply excavated. Tentacles are usually extended during the day.

Colour: Uniform grey-brown.

Similar Species: Porites porites and P. divaricata. P. porites has thicker corallite walls and smaller pali, but these distinctions are minor.

Habitat: Shallow to mid-slope reef environments.

Abundance: Common.