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Phylum Cnidaria > Class Anthozoa > Subclass Zoantharia/Hexacorallia > Order Scleractinia > Family Faviidae
Big ring coral
awaiting identification *
Family Merulinidae

updated Oct 2016
Where seen? This boulder-shaped hard coral with large circular corallites are sometimes seen on our shores.

Features: Colonies seen 10-15cm. The colony is generally a smooth boulder shape. The corallites have separate walls. In some, the corallites are squashed next to one another, resulting in an irregular pattern of circles and ovals. The walls are thick with regular ridges and no big 'teeth' sticking out. The polyps are fleshy with many short tentacles.

Colours seen include shades of blue, purple and green.

Some species of corals recorded in Singapore that have these patterns include: Barabattoia, Favia, Favites and Montastrea species. It's hard to distinguish them without close examination of small features and they are grouped here by large external features for convenience of display.

Pulau Hantu, May 05

Pulau Semakau, May 07

Pulau Hantu, Apr 06


Terumbu Bemban, Jun 10


St. John's Island, Aug 05

*Species are difficult to positively identify without close examination.
On this website, they are grouped by external features for convenience of display.

Big ring corals on Singapore shores

Photos of Big ring corals for free download from wildsingapore flickr

Distribution in Singapore on this wildsingapore flickr map

South Cyrene, Oct 10

Pulau Berkas, May 10

Raffles Lighthouse, May 04

Pulau Sudong, Dec 09

Pulau Salu, Jun 10

Pulau Salu, Jun 10

Terumbu Berkas, Jan 10

Terumbu Berkas, Jan 10

Terumbu Salu, Jan 10

Pulau Pawai, Dec 09

Terumbu Salu, Jan 10

Pulau Salu, Aug 10
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