colourful round snail is commonly seen on our rocky shores. It is
often seen in large groups and is more active at night or cool days
at low tide. The study by Tan & Clements (2008) found this snail
on rocks, breakwaters, and seawalls. Sites included: Pulau Ubin, Changi,
Tanah Merah, Marina South, Labrador, Sentosa, Pulau Bukom, St. John's
Island, Pulau Hantu, Pulau Semakau, Pulau Salu, Tuas.
Features: 2.5-3.5cm. Shell sturdy,
rounded, spire sticks out a little. Thick, spiralling ribs, smooth
and are regularly spaced. Unlike its reptile namesake the Chameleon,
this snail can't change the colour of its shell. But different individual
snails on the shore may each have different shell colours and patterns,
including some bright colours such as orange.
The flat underside white, some have ridges and a few small rounded
bumps. Small ridged 'teeth' (2-4) on the straight edge at the shell
opening. Larger shells often with at least one large rounded 'tooth'
on one side of the shell opening. Operculum thick, evenly covered
in tiny bumps, pinkish with darkish portion. Body pale with fine black
bands on the foot and long thin black tentacles.
Sometimes confused with other
similar nerites. Here's a comparison of these similar
nerite snails and how to tell them apart.
Human uses: It is collected as
food by coastal dwellers as well as for its shell for the shell trade.
St John's Island, Aug 08
Tanah Merah, Jun 09
Berlayar Creek, Apr 09
Changi, May 06
nerite snails on Singapore shores
- 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.
- Tan, S.K.
& Clements, R. (2008) Taxonomy
and distribution of the Neritidae (Mollusca: Gastropoda) on Singapore.
Zoological Studies 47(4): 481-494.
- Tan, K. S.
& L. M. Chou, 2000. A
Guide to the Common Seashells of Singapore. Singapore
Science Centre. 160 pp.
- Abbott, R.
Tucker, 1991. Seashells
of South East Asia.
Graham Brash, Singapore. 145 pp.