Skip to Content
Sign up
Report an error

Mycedium umbra

Veron, 2000

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.

Habitat: Most reef environments protected from strong wave action.

Abundance: Common.

Similar species: Mycedium elephantotus

Taxonomic note: Taxonomic note: This is a new name for what has generally been called Mycedium elephantotus in the Red Sea. Source reference: Veron (2000). Taxonomic reference: Veron (2002). Additional identification guide: Sheppard and Sheppard (1991, as Mycedium elephantotus).

Map displaying probable distribution of species. Points indicate recorded sightings from OBIS.
Mycedium umbra.  Red Sea.  Characteristic appearance of convoluted fronds.  Mary Stafford-Smith.

Mycedium umbra.Red Sea.Characteristic appearance of convoluted fronds.Mary Stafford-Smith.

Mycedium umbra.  Red Sea.  Characteristic appearance of convoluted fronds.  Mary Stafford-Smith.

Mycedium umbra.Red Sea.Characteristic appearance of convoluted fronds.Mary Stafford-Smith.

Mycedium umbra.  Red Sea.  Corallite detail. Costal ridges can be seen extending from the edges of the corallites to the colony margin.  Charlie Veron.

Mycedium umbra.Red Sea.Corallite detail. Costal ridges can be seen extending from the edges of the corallites to the colony margin.Charlie Veron.

Mycedium umbra.  Red Sea.  Showing corallites.

Mycedium umbra.Red Sea.Showing corallites.

Mycedium umbra.  Red Sea.  Showing corallites.

Mycedium umbra.Red Sea.Showing corallites.

Mycedium umbra.  Southern Red Sea.  Showing corallites.

Mycedium umbra.Southern Red Sea.Showing corallites.

Mycedium umbra.  Red Sea.  Showing corallites.

Mycedium umbra.Red Sea.Showing corallites.

Mycedium umbra.  Red Sea.  Showing corallite detail.

Mycedium umbra.Red Sea.Showing corallite detail.