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Phylum Mollusca > Class Gastropoda > Family Olividae
Weasel olive snail
Oliva mustelina*
Family Olividae
updated Oct 2016

Where seen? This small bullet-shaped snail is sometimes seen on Changi and our Northern shores. It is a burrowing snail and more often seen above the ground at night or with the incoming tide.

Features: 2-3.5cm. Shell thick heavy, cylindrical bullet-shaped with conical spire. The glossy shell beige with closely set fine dark brown zig-zag lines. The shell opening violet. The animal has a large beige body with brownish spots all over. A long siphon sticks out of the notch in the shell.

Changi, Jun 06

Short conical spire.

Shell opening violet.

East Coast Park, Aug 09

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

Weasel olive snails on Singapore shores

Photos of Weasel olive snails for free download from wildsingapore flickr

Distribution in Singapore on this wildsingapore flickr map

  • Oliva mustelina on SeaLife Base: Technical fact sheet and photo.
  • Family Olividae in the Gastropods section by J.M. Poutiers in the FAO Species Identification Guide for Fishery Purposes: The Living Marine Resources of the Western Central Pacific Volume 1: Seaweeds, corals, bivalves and gastropods on the Food and Agriculture Organization of the United Nations (FAO) website.


  • 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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