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Ctenactis echinata

(Pallas, 1766)

Polyps are elongate. Septal teeth and costal spines are both strongly developed. Only a single mouth is present.

Colour: Usually brown.

Habitat: Reef slopes and lagoons.

Abundance: Common.

Similar species: Ctenactis albitentaculata , Ctenactis crassa

Taxonomic note: Source reference: Veron (2000). Taxonomic references: Veron and Pichon (1980), Hoeksema (1989). Additional identification guides: Veron (1986), Sheppard and Sheppard (1991), Nishihira and Veron (1995).

Map displaying probable distribution of species. Points indicate recorded sightings from OBIS.
Ctenactis echinata.  Vanuatu.  This species forms the heaviest single polyp of any coral.  Charlie Veron.

Ctenactis echinata. Vanuatu. This species forms the heaviest single polyp of any coral. Charlie Veron.

Ctenactis echinata.  Great Barrier Reef, Australia.  The most common general appearance and shape.  Charlie Veron.

Ctenactis echinata. Great Barrier Reef, Australia. The most common general appearance and shape. Charlie Veron.

Ctenactis echinata.  Great Barrier Reef, Australia.  Septal detail.  Ed Lovell.

Ctenactis echinata. Great Barrier Reef, Australia. Septal detail. Ed Lovell.

Ctenactis echinata.  Great Barrier Reef, Australia.  Showing septa.

Ctenactis echinata. Great Barrier Reef, Australia. Showing septa.

Ctenactis echinata.  Great Barrier Reef, Australia.  Showing upper surface.

Ctenactis echinata. Great Barrier Reef, Australia. Showing upper surface.

Ctenactis echinata.  Great Barrier Reef, Australia.  Showing upper surface.

Ctenactis echinata. Great Barrier Reef, Australia. Showing upper surface.

Ctenactis echinata.  Great Barrier Reef, Australia.  Showing mouth region.

Ctenactis echinata. Great Barrier Reef, Australia. Showing mouth region.

Ctenactis echinata.  Great Barrier Reef, Australia.  Showing costae.

Ctenactis echinata. Great Barrier Reef, Australia. Showing costae.