Colonies sprawl over the substrate and have dead bases so that they fall apart if disturbed. Branches are less than 5 millimetres thick, are generally straight and do not taper. Corallites are tubular and project up to 1.5 millimetres. Tentacles may be extended day and night.
Brown with pale brown or cream branch tips.
May cover extensive areas on horizontal muddy substrates with clear water.
displaying probable distribution of species. Points indicate recorded sightings from OBIS.
Anacropora matthai.Papua New Guinea.Fine branches.Charlie Veron.
Anacropora matthai.Indonesia.This species (left) normally occurs as compact thickets of fine branches growing on soft substrates. It occurs here on an upper reef slope with Hydnophora rigida (yellow centre right) and other corals.Charlie Veron.