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Phylum Mollusca > Class Gastropoda > Limpets
Guam false limpet
Siphonaria guamensis
Family Siphonariidae
updated Aug 2020

Where seen?This little limpet is commonly seen in small groups on boulders and hard surfaces on many of our shores, usually near the high water mark.

1-2cm. Shell thin conical with a pointed tip and many fine white ribs. There is no hole at the top of the shell. Body plain white. It is a false limpet and breathes through lungs instead of gills.

Changi, May 02

East Coast Park, Aug 12

A broad foot to cling firmly to the surface.
Kusu Island, Dec 04
Limpet Babies: Siphonaria limpets lay eggs in circular or coiling jelly-like masses that contain thousands of eggs suspended in a gelatinous matrix, attached to a hard surface. The free-swimming limpet larvae have a little spiral shell like other 'normal' snails. As they develop, the shell flattens and becomes umbrella-shaped.

Coiled egg mass laid on a rock.
Changi, Jan 13

Tiny eggs embedded in the coiled egg mass.
Changi, Jan 13

Guam false limpets on Singapore shores
On wildsingapore flickr

Other sightings on Singapore shores

Pulau Sekudu, Jun 17
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.
  • Tan, K. S. & L. M. Chou, 2000. A Guide to the Common Seashells of Singapore. Singapore Science Centre. 160 pp.
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