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Phylum Echinodermata > Class Holothuroidea
Kumquat sea cucumber
Actinopyga sp.
Family Holothuriidae

updated Oct 2016

Where seen? This small smooth reddish orange sea cucumber does resemble a kumquat! It is sometimes seen on our Southern shores among coral rubble and near reefs.

Features: About 8cm long. Body oval to sausage-like, with a flat underside where the mouth is located. Colour uniformly orange, some with paler spots. Tube feet very long, slender, many emerging on the flat underside but also scattered all over the upperside. Feeding tentacles yellowish with flowery tips. It may be the same as the Actinopyga sp. in Lane's guide of which "just a single specimen was seen, from the reef slope of Sultan Shoal".


Pulau Hantu, Jan 12

Flat underside.

Terumbu Semakau, May 18

Photo shared by Loh Kok Sheng on facebook.

Kumquat sea cucumbers on Singapore shores
On wildsingapore flickr

Other sightings on Singapore shores


Cyrene Reef, Mar 09

Shared by Loh Kok Sheng on his blog.

Terumbu Semakau, May 13

Shared by Loh Kok Sheng on flickr.


Terumbu Bemban, Jun 14

Photo shared by Loh Kok Sheng on his blog.

Terumbu Pempang Tengah, Apr 13

Photo shared by Loh Kok Sheng on flickr


Pulau Semakau (South), Apr 18

Photo shared by Loh Kok Sheng on facebook.

Terumbu Semakau, Nov 12

Photo shared by Loh Kok Sheng on flickr

References

  • Lane, David J.W. and Didier Vandenspiegel. 2003. A Guide to Sea Stars and Other Echinoderms of Singapore. Singapore Science Centre. 187pp.
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