Characters: Polyps are elongate, with an axial furrow extending most of the polyp length. Several mouths are arranged along the axial furrow but do not occur outside the furrow. Septal teeth are long and tapered. Tentacles are usually partly extended during the day. Colour: Pale brown with conspicuous white tentacles. Similar species: Ctenactis echinata, which does not have white tentacles and has less tapered septal teeth. Habitat: Shallow reef environments. Abundance: Sometimes common