Characters: Colonies are arborescent. Corallites are tubular and thin walled with flaring rims. Columellae are absent. Septa are very exsert. Tentacles are usually extended only at night. They have tapering translucent tentacles with white tips. Colour: Pale brown, yellow or green, sometimes with white branch ends. Similar species: Galaxea acrhelia. Habitat: Usually found in reef areas with good water circulation and light availability. Abundance: Uncommon.