Phylum Cnidaria > Class Anthozoa > Subclass Alcyonaria/Octocorallia > Order Gorgonacea
Flat branch sea fan
Subergorgia sp.*
Family Subergorgiidae
updated Dec 2019

Where seen? This sea fan with flat branches is sometimes seen on some of our Northern shores on coral rubble.

Features: 10-20cm long. Colony comprises many long sturdy stems that randomly branch forming an elegant tree-like silhouette on one plane, with some branches overlapping. The stems are flattened, often with a groove along the length. Dull brown-orange, to orange or red. Relatively large white polyps emerge along two sides of the flattened stem, not in the grooves.

Tuas, Apr 05

Species are difficult to positively identify without close examination.
On this website, they are grouped by external features for convenience of display
Flat branch sea fans on Singapore shores
On wildsingapore flickr

Other sightings on Singapore shores

Beting Bronok, Jul 03

East Coast Park, Jul 09

Photo shared by Loh Kok Sheng on his blog.

Tuas, Apr 05

East Coast Park, May 21
Photo shared by Loh Kok Sheng on facebook.

An ovulid snail on the sea fan.



  • Fabricius, Katharina and Philip Alderslade, 2001. Soft Corals and Sea Fans. Australian Institute of Marine Science and the Museum and Art Gallery of the Northern Territoriy. 264 pp.
  • Goh, N.K.C. and Chou, L.M. 20 December 1996. An annotated checklist of the gorgonians (Anthozoa: Octocorallia) of Singapore, with a discussion of gorgonian diversity in the Indo-West Pacific. Raffles Museum Bulletin of Zoology Pp. 435-459.
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