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Phylum Mollusca > Class Gastropoda
Ulimid snails
Family Eulimidae
updated Oct 2016
Where seen? These tiny white snails are sometimes seen on sea stars. Ulimid snails are also found on other echinoderms such as sea cucumbers and sea urchins.

Features: 0.1-0.5cm. Long white conical shell. So far, these have been seen on Plain sand star (Astropecten sp.), Painted sand star (Astropecten sp.) and on Common sea star (Archaster typicus). Stuck on the upper side of the sea star, sometimes in between the arms in the 'arm pit' of the sea star. Also on a Thorny sea cucumber. When not attached to a sea star, they may float on the water surface, often forming 'rafts' sticking to one another.

What do they eat? These are parasitic snails that feed on their host. Apparently, they stick their proboscis through the body wall and suck on the host's body fluids.

Cyrene Reef, Jul 12
On Common sea star.

Ulimid snails on Singapore shores

Photos of Ulimid snails for free download from wildsingapore flickr

Distribution in Singapore on this wildsingapore flickr map


On a plain sand star.
Changi, Jun 05

Laying eggs too?

Changi, Jan 15
Photo shared by Marcus Ng on facebook.


East Coast Park, Feb 16
On a Painted sand star.
Photo shared by Loh Kok Sheng on flickr.

East Coast, Jun 09
On a sea cucumber.
Photo shared by James Koh on flickr.

Cyrene Reef, Aug 11
On a Cake sand dollar.


Cyrene Reef, Jul 12
On Common sea star.

Cyrene Reef, Jul 12
On Common sea star.

Cyrene Reef, Aug 11
On Common sea star.

Familty Eulimidae recorded for Singapore
from Tan Siong Kiat and Henrietta P. M. Woo, 2010 Preliminary Checklist of The Molluscs of Singapore.

  Family Eulimidae
  Melanella aciculata
Melanella martinii

Niso hizensis

Pyramidelloides mirandus

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.
  • Coleman, Neville. 2003. 2002 Sea Shells: Catalogue of Indo-Pacific Mollusca Neville Coleman's Underwater Geographic Pty Ltd, Australia.144pp.
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