Skip to Content
Sign up
Report an error

Cycloseris hexagonalis

(Milne Edwards and Haime, 1848)

Polyps are flat, with a slight central dome around the mouth. Septa are not thickened or exsert around the mouth. Small corals have an angular outline that becomes irregular when fully grown. They reach 90 millimetres diameter. Septa are thick and unequal. Tentacular lobes are absent. Costae are fine and only developed towards the polyp perimeter.

Colour: Brown, green or yellow. Small polyps often have six pale primary septa resembling spokes of a wheel.

Habitat: Soft inter-reef substrates.

Abundance: Uncommon.

Similar species:

Taxonomic note: Source reference: Veron (2000). Taxonomic reference: Hoeksema (1989, as Fungia (Cycloseris) hexagonalis). Additional identification guides: Maragos (1977), Nishihira and Veron (1995).

Map displaying probable distribution of species. Points indicate recorded sightings from OBIS.
Cycloseris hexagonalis.  Ryukyu Islands, Japan.  Different growth stages and with one individual overturned.  Moritaka Nishihra.

Cycloseris hexagonalis.Ryukyu Islands, Japan.Different growth stages and with one individual overturned.Moritaka Nishihra.

Cycloseris hexagonalis.  Indonesia.  A large specimen with tentacles extended.  Valerie Taylor.

Cycloseris hexagonalis.Indonesia.A large specimen with tentacles extended.Valerie Taylor.

Cycloseris hexagonalis.  Indonesia.  Showing upper surface.

Cycloseris hexagonalis.Indonesia.Showing upper surface.

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

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

Cycloseris hexagonalis.  Ryukyu Islands, Japan.  Showing lower surface.

Cycloseris hexagonalis.Ryukyu Islands, Japan.Showing lower surface.