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Phylum Mollusca > Class Gastropoda > Family Olividae
Orange-mouth olive snail
Oliva miniacea*
Family Olividae
updated Oct 2016

Where seen? This large bullet-shaped snail is sometimes seen on Cyrene Reef. It is a burrowing snail and more often seen above the ground at night or with the incoming tide. It was previously known as Olivia sericea.

Features: 4-5cm. Shell thick heavy, cylindrical bullet-shaped, shell spire flattened with short pointed tip. The glossy shell has a pattern of closely set zig-zag lines with dark spirals across the whole pattern. The shell opening may be orange on the inner portion. The animal has a large pale body with brownish spots all over. A long siphon sticks out of the notch in the shell. It does not have an operculum.

Oliva irisans may look similar.

Status and threats: This olive snail is listed as 'Vulnerable' in the Red List of threatened animals of Singapore.

Cyrene Reef, Jun 09

Spire flattened with short pointed tip.

Shell opening often orange or orangey.

Cyrene Reef, Aug 11

Cyrene Reef, Aug 11

Cyrene Reef, Oct 08

Photo shared by Toh Chay Hoon on her flickr.

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

Orange-mouth olive snails on Singapore shores

Photos of Orange-mouth olive snails for free download from wildsingapore flickr

Distribution in Singapore on this wildsingapore flickr map

With grateful thanks to JK of for identifying this snail on the wild shores blog.



  • 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.
  • Davison, G.W. H. and P. K. L. Ng and Ho Hua Chew, 2008. The Singapore Red Data Book: Threatened plants and animals of Singapore. Nature Society (Singapore). 285 pp.
  • Abbott, R. Tucker, 1991. Seashells of South East Asia. Graham Brash, Singapore. 145 pp.
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