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Phylum Mollusca > Class Gastropoda > sea slugs > Order Nudibranchia > Family Phyllidiidae
Varicose phyllid nudibranch
Phyllidia varicosa
Family Phyllidiidae
updated May 2020

Where seen? This colourful nudibranch is sometimes encountered on some of our Southern shores, on coral rubble and reefs.

Features: 4-5 cm long. Body long, hard with bumps (called tubercles) without feathery external gills on the back. Distinguished by 3-6 ridges of bumps along the length of the body. The bumps are blue-grey where they join the body and tipped yellow. The short rhinophores are orange. On the underside, there is a dark stripe or line of dark dots/dashes along the length of its foot. It secretes noxious substances from glands in the white coloured portion of its body.

Terumbu Semakau, May 12
.

Orange rhinophores.

Another set of tentacles underneath.
Terumbu Semakau, May 12

Dark
stripe or line of dark dashes/dots on the underside.
Pulau Jong, Jul 06.


Gills on the sides instead of in
a feathery bunch on the back
Terumbu Semakau, May 12
.

Varicose phyllid nudibranchs on Singapore shores
On wildsingapore flickr

Other sightings on Singapore shores


Lazarus Island, Feb 21
Photo shared by James Koh on flickr.

Big Sisters Island, Feb 22
Photo shared by James Koh on facebook.
 


Big Sisters Island, Feb 08
Photo shared by Toh Chay Hoon on flickr.

Little Sisters Island, Feb 15
Photo shared by Loh Kok Sheng on his blog.


St John's Island, Apr 21
Photo shared by Jianlin Liu on facebook.

St John's Island, Apr 21
Photo shared by Jianlin Liu on facebook.


Pulau Hantu, Apr 09
Photo shared by Toh Chay Hoon on her blog.

Pulau Jong, Apr 15
Photo shared by Marcus Ng on facebook.
 


Pulau Semakau North, Jul 15
Photo shared by Juria Toramae on facebook.

Pulau Semakau North, Jul 15
Photo shared by Juria Toramae on facebook.
 


Pulau Semakau (East), Dec 20
Photo shared by Jianlin Liu on facebook.

Pulau Semakau (East), Dec 20
Photo shared by Loh Kok Sheng on facebook.
 


Terumbu Semakau, Apr 21
Photo shared by Jianlin Liu on facebook.

Beting Bemban Besar, Aug 18
Photo shared by Jianlin Liu on facebook.
 


Beting Bemban Besar, Jun 19
Photo shared by Jianlin Liu on facebook.

Beting Bemban Besar, Jun 19
Photo shared by Jianlin Liu on facebook.

Links
References
  • Tan Siong Kiat and Henrietta P. M. Woo, 2010 Preliminary Checklist of The Molluscs of Singapore (pdf), Raffles Museum of Biodiversity Research, National University of Singapore.
  • Coleman, Neville, 1989. Nudibranchs of the South Pacific Vol 1. 64 pp.
  • Debelius, Helmut, 2001. Nudibranchs and Sea Snails: Indo-Pacific Field Guide IKAN-Unterwasserachiv, Frankfurt. 321 pp.
  • Wells, Fred E. and Clayton W. Bryce. 2000. Slugs of Western Australia: A guide to the species from the Indian to West Pacific Oceans. Western Australian Museum. 184 pp.
  • Coleman, Neville. 2001. 1001 Nudibranchs: Catalogue of Indo-Pacific Sea Slugs. Neville Coleman's Underwater Geographic Pty Ltd, Australia.144pp.
  • Humann, Paul and Ned Deloach. 2010. Reef Creature Identification: Tropical Pacific New World Publications. 497pp.
  • Gosliner, Terrence M., David W. Behrens and Gary C. Williams. 1996. Coral Reef Animals of the Indo-Pacific: Animal life from Africa to Hawaii exclusive of the vertebrates Sea Challengers. 314pp.
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