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Phylum Mollusca > Class Gastropoda > Family Littorinidae
Rock periwinkle snail
awaiting identification*
Family Littorinidae
updated Aug 2020

Where seen? This small snail is often seen on many of our rocky shores. At low tide, it is usually seen in groups wedged into crevices and cracks in rocks. At night and on cool, rainy days, they actively move about in large numbers on the rocks or among seaweeds growing on the rocks.

Features: 0.8-1cm. Shells thin and smooth with fine grooves. Colours variable from black to light with brown speckles or stripes. Operculum thin, circular, brown and made from a horn-like material. The animal has short tentacles.

Species are difficult to positively identify without close examination. On this website, the various kinds of tiny periwinkle snails found on rocks are grouped here for convenience of display.

Sentosa, Aug 07

Pulau Ubin, Dec 10

East Coast Park, Aug 12

East Coast Park, Aug 12

*Species are difficult to positively identify without close examination.
On this website, they are grouped by external features for convenience of display.

Rock periwinkle snails on Singapore shores
On wildsingapore flickr

Other sightings on Singapore shores

Pulau Ubin OBS, Jan 16
Photo shared by Marcus Ng on facebook.



  • Tan Siong Kiat and Henrietta P. M. Woo, 2010 Preliminary Checklist of The Molluscs of Singapore (pdf), Lee Kong Chian Natural History Museum, National University of Singapore.
  • Tan, K. S. & L. M. Chou, 2000. A Guide to the Common Seashells of Singapore. Singapore Science Centre. 160 pp.
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