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Phylum Mollusca > Class Gastropoda > Family Naticidae
Bosom moon snail
Polinices mammatus
Family Naticidae
updated Aug 2020
Where seen? This flat moon snail is sometimes seen on our Northern shores among seagrasses. Elsewhere, they are found in deeper water and considered uncommon. Mamma means 'breast' in Latin.

Features: 1.5-3cm. Shell thin, flat with three broad bands of dark brown stripes. On the underside, a dark chocolate brown lip. Operculum is made of a thin horn-like material, orange or brown. Body plain white. When alive, the body is much larger than the shell, usually enveloping the entire shell making it hard to see the shell.

This one seemed to be dying.
Changi, Jul 11

This one seemed to be dying.
Changi, Jul 11

Living snail, body is huge.
Changi, Jun 13

Bosom moon snails on Singapore shores
On wildsingapore flickr

Other sightings on Singapore shores

Pulau Sekudu, Jul 20
Photo by Loh Kok Sheng 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.
  • Abbott, R. Tucker, 1991. Seashells of South East Asia. Graham Brash, Singapore. 145 pp.
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