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Phylum Cnidaria > Class Anthozoa > Subclass Zoantharia/Hexacorallia > Order Scleractinia > Family Poritidae > Goniopora sp.
Anemone coral
Goniopora sp.*

Family Poritidae
updated May 13

Where seen? This hard coral with long-bodied polyps is commonly seen on many of our reefs, including those on our Northern shores. Although they are more common on our Southern shores.

Features: Colonies clusters of short, fat columns with rounded tops, each about 10-15cm in diameter. The polyps may be large (0.5-1cm in diameter). The polyps have 24 tentacles and are usually extended when submerged, even in daylight. Some may have long skinny tentacles, others have short and fat ones. The body column can be very long (2-5cm). The polyps can retract completely into the skeleton, revealing the small corallites (0.5cm) circular or polygonal holes packed close to one another. Colours seen include shades of purple, pink, brown and blue.

May be mistaken for sea anemones when the long polyps are extended and hide the hard skeleton, thus its common name. Another common name is Flower pot coral as the colony looks like a bunch of long-stemmed flowers emerging from a pot.
Here's more on how to tell apart large sea anemones with long tentacles and large 'hairy' cnidarians.

Sometimes, tiny brown acoel flatworms are seen on the oral disk or body columns of the polyps.

Pulau Hantu, Jan 10

Pulau Semakau, Mar 05

Neat circular corallites.


Acoel flatworms
Pulau Semakau, Aug 11

Acoel flatworms
Beting Bronok, Jul 05

Acoel flatworms
Terumbu Pempang Tengah, May 11


St. John's Island, Apr 12

Polyps can retract completely.

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

Anemone corals on Singapore shores

Photos of Anemone corals for free download from wildsingapore flickr

Distribution in Singapore on this wildsingapore flickr map


East Coast Park Big Splash, Jun 15

Photo shared by Loh Kok Sheng on facebook.


Pulau Biola, May 10
 


Pulau Senang, Jun 10

Pulau Senang, Aug 10
 


Pulau Sudong, Dec 09

Pulau Salu, Jun 10

Terumbu Salu, Jan 10

Photo shared by Loh Kok Sheng on his flickr.


Pulau Pawai, Dec 09

Pulau Pawai, Dec 09
 
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