Characters: Colonies are laminar or encrusting. Corallites are up to 15 millimetres diameter, nose-shaped and face outward towards the colony perimeter. Septa and columellae are well developed and costae form outwardly radiating ribs on the colony surface. Costae have few ornamentations and costal ridges extend towards the periphery from the edge of corallites. The coenosteum is never pitted at the commencement of new septo-costae. Tentacles are extended only at night.

Colour: Upper or peripheral parts of colonies are yellowish-brown while older parts are iridescent purple-grey.

Similar Species: Mycedium elephantotus, which has a very wide range of corallite structures and colours. The present species has a distinctive colouration, tends to be more convoluted, has more widely spaced corallites and has costal ridges extending outward from the edges of corallites. Costal spines are less prominent.

Habitat: Most reef environments protected from strong wave action.

Abundance: Common.