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Phylum Mollusca > Class Gastropoda > sea slugs > Order Nudibranchia
Beaded nudibranch
Hoplodoris nodulosa
Family Discodorididae
updated May 2020
Where seen? This nudibranch covered in bead-like bumps is sometimes seen on on our Northern shores among seagrasses and seaweeds. It appears to be seasonally common, often many seen during a single visit, then not seen again for some time.

Features: 4-5cm long. Hard broad body covered with rounded bumps of different sizes. With a broad band down the centre of the body which has fewer or no bumps and is usually darker in colour. Colour usually pale beige, brown, pinkish. Sometimes with a few darker smudged bars perpendicular to the body margin. The body doesn't fall apart when handled. Gills feathery and orange. The underside is pale with some smudged darkish blotches on the margins. The narrow foot is plain.

Pulau Sekudu, Aug 05

Underside.

Pulau Sekudu, Jul 06

Rhinophores.

Feathery gills.

Egg ribbon laid by the nudibranch.

Pasir Ris, Mar 20
An upside down nudibranch turning itself right side up, with a glimpse of egg ribbon nearby, probably laid by it.
Hoplodoris nodulosa

Beaded nudibranchs on Singapore shores
On wildsingapore flickr

Other sightings on Singapore shores


Punggol, Sep 18
Photo shared by Dayna Cheah on facebook.

Changi, Dec 12
Photo shared by Loh Kok Sheng on flickr.

Changi, Jan 20
Photo shared by Jianlin Liu on facebook.


Pulau Ubin, Dec 12
Photo shared by Loh Kok Sheng on flickr.

Chek Jawa, Jan 14
Photo shared by Loh Kok Sheng on facebook.



Pulau Sekudu, Apr 09

Photo shared by Toh Chay Hoon on her blog.

Chek Jawa, Nov 07

Photo shared by Toh Chay Hoon on her flickr.

Tanah Merah, Jul 09

Photo shared by James Koh on his blog.

Cyrene, Feb 17
Photo shared by Loh Kok Sheng on facebook.

Big Sisters Island, Jan 20
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.
  • 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.
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