Phylum Cnidaria > Class Anthozoa > Subclass Alcyonaria/Octocorallia > Order Gorgonacea
Skinny sea fans
Astrogorgia sp.*
Family Plexauridae
updated Dec 2019

Where seen? This sea fan with long, skinny branches is sometimes seen in numbers on our Northern shores. On coral rubble, rocks, stones and artificial hard surfaces.

Features: 10-20cm long. Generally with long branches without much side branching. In some colonies, the long branches are neatly and evenly spaced along the central stem on one plane so the whole colony looks like the veins of a leaf. But in some large colonies, the long branches are more tangled. Stems long, skinny and somewhat flattened often with a ridge 'mid-rib' along the centre of the stem. Colours seen include red, maroon, orange and yellow. The white polyps are relatively large (0.5cm) compared to the stem and emerge on opposite edges of the flattened stems.

Those seen on our shores often have all kinds of small animals clinging onto to them including tiny colourful brittle stars, transparent shrimps and ovulid snails.

East Coast, Jun 06

Changi, Jul 09

Chek Jawa, Jul 05

Tiny colourful brittle stars.
Changi, Jun 12

Red flatworm?
East Coast, Dec 08

Ovulid snails
East Coast, Jun 06

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

Other sightings on Singapore shores

Tanah Merah, Dec 09
Photo shared by Loh Kok Sheng on his blog.

Tanah Merah Ferry Terminal, Jun 15
Photo shared by Loh Kok Sheng on facebook.

East Coast Park, Jul 09
Photo shared by Loh Kok Sheng on his blog.

East Coast PCN, Apr 17
Photo shared by Loh Kok Sheng on facebook.



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