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.
Taxonomic References: Veron and Pichon (1980) as Acrhelia horrescens; Veron (2000a);
Identification Guides: Randall and Myers (1983) as Acrhelia horrescens; Veron (1986a) as Acrhelia horrescens; Nishihira and Veron (1995) as Acrhelia horrescens;
