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Phylum Mollusca > Class Gastropoda > Family Naticidae
Eggwhite moon snail
Polinices albumen
Family Naticidae
updated Oct 2016

Where seen? This flat moon snail with a U-shaped depression on the underside is often seen on Cyrene Reef on the sand bar. Elsewhere, it is found in clean sandy bottoms from shallow subtidal area to a depth of about 70 m. It is also known as Neverita albumen.

Features: 4-6cm. Shell heavy, circular wider than long and very flat, with an almost flat spire. Shell smooth and glossy, apart from very fine lines of growth. White at the spire, uniform colour elsewhere: cream or pale yellow to brown and orangey brown. There is a deep U-shaped depression on the white underside. Operculum made of a thin horn-like material, reddish or yellowish brown. The huge body is completely white and when expanded, it does resemble the albumen of a hard boiled egg.

Human uses: Where common, it is harvested for food and for the shell. In Thailand, commonly collected by fishing nets from depths of 2 to 10 m. Known also to be sold as food in the markets of Kyushu (Japan).

Cyrene Reef, Jun 12

Changi, Jan 10

Cyrene Reef, May 12

Cyrene Reef, May 12

Cyrene Reef, Jul 12

Eggwhite moon snails on Singapore shores

Photos of Eggwhite moon snails for free download from wildsingapore flickr

Distribution in Singapore on this wildsingapore flickr map



  • 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.
  • Abbott, R. Tucker, 1991. Seashells of South East Asia. Graham Brash, Singapore. 145 pp.
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