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Coscinaraea exesa

(Dana, 1846)

Colonies are columnar and may be several metres across. Corallites are in shallow valleys. Columellae are compact and reach the height of the inner septal margins. Septo-costae are usually granulated and have a conspicuous granule near the valley wall. Tentacles are often extended during the day.

Colour: Uniform dark grey, or brown.

Habitat: Shallow reef environments.

Abundance: Common.

Similar species: Psammocora digitata

Taxonomic note: Source reference: Veron (2000). Taxonomic reference: Veron and Pichon (1980). Additional identification guides: Veron (1986), Nishihira and Veron (1995).

Map displaying probable distribution of species. Points indicate recorded sightings from OBIS.
Coscinaraea exesa.  Great Barrier Reef, Australia.  A cluster of columns.  Ed Lovell.

Coscinaraea exesa. Great Barrier Reef, Australia. A cluster of columns. Ed Lovell.

Coscinaraea exesa.  Great Barrier Reef, Australia.  Variation in surface detail and showing septal granules.  Valerie Taylor.

Coscinaraea exesa. Great Barrier Reef, Australia. Variation in surface detail and showing septal granules. Valerie Taylor.

Coscinaraea exesa.  Great Barrier Reef, Australia.  Showing tentacles extended during the day.  Valerie Taylor.

Coscinaraea exesa. Great Barrier Reef, Australia. Showing tentacles extended during the day. Valerie Taylor.

Coscinaraea exesa.  Papua New Guinea.  Variation in surface detail and showing septal granules.  Charlie Veron.

Coscinaraea exesa. Papua New Guinea. Variation in surface detail and showing septal granules. Charlie Veron.

Coscinaraea exesa.  Papua New Guinea.  Surface of a large column.  Charlie Veron.

Coscinaraea exesa. Papua New Guinea. Surface of a large column. Charlie Veron.

Coscinaraea exesa. Skeletal detail.  Geoff Kelly.

Coscinaraea exesa. Skeletal detail. Geoff Kelly.

Coscinaraea exesa.  Great Barrier Reef, Australia.  Showing colony surface.

Coscinaraea exesa. Great Barrier Reef, Australia. Showing colony surface.

Coscinaraea exesa.  Great Barrier Reef, Australia.  Showing corallites.

Coscinaraea exesa. Great Barrier Reef, Australia. Showing corallites.

Coscinaraea exesa.  Great Barrier Reef, Australia.  Showing corallites.

Coscinaraea exesa. Great Barrier Reef, Australia. Showing corallites.

Coscinaraea exesa.  Great Barrier Reef, Australia.  Showing branch end.

Coscinaraea exesa. Great Barrier Reef, Australia. Showing branch end.

Coscinaraea exesa.  Great Barrier Reef, Australia.  Showing branches.

Coscinaraea exesa. Great Barrier Reef, Australia. Showing branches.