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Phylum Mollusca > Class Gastropoda > sea slugs > Order Nudibranchia
Tiny striped nudibranch
Dermatobranchus sp.
Family Arminidae
updated Mar 2020

Where seen? This tiny nudibranch is sometimes seen on coral rubble and seaweeds near reefs on our Southern shores. Relatively regular encounters suggest they may be quite common but often overlooked because they are so tiny.

Features: About 1cm long. Body very long and slender, dark with fine white ridges with an even finer yellow line down the centre of the ridges. Yellow body margins, dark rhinophores, a white wedge-shaped flap over its mouth (oral veil) also with yellow margins. The underside is white. It lacks a feathery gill on its back.

Sometimes confused with Armina nudibranchs (Armina sp.) which are much larger.

What does it eat? According to Bill Rudman some species eat soft corals and sea fans.

Labrador, Jun 08

Sentosa, Mar 07

Tiny striped nudibranchs on Singapore shores
On wildsingapore flickr

Other sightings on Singapore shores

Sentosa, Dec 18
Photo shared by Loh Kok Sheng on facebook.

Lazarus Island, Mar 16
Photo shared by Law Ing Sind on facebook.

Kusu Island, Jun 15
Photo shared by Toh Chay Hoon on facebook.

St John's Island, Aug 09
Photo shared by James Koh on flickr.

Cyrene, Feb 20
Photo shared by Loh Kok Sheng on facebook.

Small Sisters Island, May 18
Photo shared by Dayna Cheah on facebook.

Big Sisters Island, Jun 17
Photo shared by Marcus Ng on facebook.

Pulau Semakau East, Jul 15
Photo shared by Toh Chay Hoon on facebook.

Terumbu Pempang Laut, May 15
Photo shared by Heng Pei Yan on facebook

Pulau Berkas, May 10
Photo shared by Marcus Ng on flickr.

  • 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.
  • 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.
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