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Cycloseris cyclolites

(Lamarck, 1801)

Polyps are circular or slightly oval domes up to 40 millimetres wide with a concave undersurface. Septa are straight and symmetrical. Primary septa are thick and exsert around the mouth.

Colour: Pale cream or greenish, often with white margins to major septa. Sometimes brightly coloured in shallow water.

Habitat: Soft inter-reef and sometimes reef substrates.

Abundance: Common.

Similar species: Cycloseris curvata

Taxonomic note: Taxonomic note: Specimens from the western Indian Ocean and Red Sea are doubtfully included in this species. Source reference: Veron (2000). Taxonomic references: Veron and Pichon (1980), Hoeksema (1989, as Fungia (Cycloseris) cyclolites). 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.
Cycloseris cyclolites.  Great Barrier Reef, Australia.  With tentacles extended.  Ed Lovell.

Cycloseris cyclolites.Great Barrier Reef, Australia.With tentacles extended.Ed Lovell.

Cycloseris cyclolites.  Great Barrier Reef, Australia.  With tentacles extended.  Charlie Veron.

Cycloseris cyclolites.Great Barrier Reef, Australia.With tentacles extended.Charlie Veron.

Cycloseris cyclolites.  Great Barrier Reef, Australia.  With tentacles extended.  Charlie Veron.

Cycloseris cyclolites.Great Barrier Reef, Australia.With tentacles extended.Charlie Veron.

Cycloseris cyclolites.  Tanzania.  Distinctive appearance of western Indian Ocean specimens.  Charlie Veron.

Cycloseris cyclolites.Tanzania.Distinctive appearance of western Indian Ocean specimens.Charlie Veron.

Cycloseris cyclolites.  Philippines.  Usual appearance with tentacles retracted.  Doug Fenner.

Cycloseris cyclolites.Philippines.Usual appearance with tentacles retracted.Doug Fenner.

Cycloseris cyclolites.  Southern Red Sea.  Showing septal shape.

Cycloseris cyclolites.Southern Red Sea.Showing septal shape.

Cycloseris cyclolites.  Southern Red Sea.  Showing lower surface.

Cycloseris cyclolites.Southern Red Sea.Showing lower surface.

Cycloseris cyclolites.  Ryukyu Islands, Japan.  Showing upper surface.

Cycloseris cyclolites.Ryukyu Islands, Japan.Showing upper surface.

Cycloseris cyclolites.  Great Barrier Reef, Australia.  Showing upper surface.

Cycloseris cyclolites.Great Barrier Reef, Australia.Showing upper surface.

Cycloseris cyclolites.  Great Barrier Reef, Australia.  Showing undersurface.

Cycloseris cyclolites.Great Barrier Reef, Australia.Showing undersurface.