These tiny white snails are sometimes seen on sea stars. Ulimid snails
are also found on other echinoderms such as sea cucumbers and sea
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.
snails on Singapore shores
Eulimidae recorded for Singapore
from Tan Siong
Kiat and Henrietta P. M. Woo, 2010 Preliminary Checklist of The
Molluscs of Singapore.
- 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.
Neville. 2003. 2002
Sea Shells: Catalogue of Indo-Pacific Mollusca
Neville Coleman's Underwater Geographic Pty Ltd, Australia.144pp.