seen? This snail is commonly seen on many of our Southern rocky shores and artificial
seawalls. The study by Tan & Clements (2008) found this snail
in crevices and under rocks of breakwaters and rocky shores of middle
to upper intertidal zones. They note that the snails are nocturnal,
emerging from their hiding places at dusk. Sites included: Pulau Ubin,
Changi, Marina South, Sentosa, St. John's Island, Pulau Hantu, Pulau
Salu, Tuas, Labrador, Raffles Lighthouse.
Features: 2-4cm. Shell thick heavy,
hemispheical, the spire sticks out. Narrow, spiralling ribs, smooth and
regularly spaced. Shell patterns and colour variable, sometimes all black.
The flat underside white sometimes yellowish especially at the sides of the shell opening. Some have ridges, wrinkles and a few small
rounded bumps. Square notched 'teeth' (3-5) on the straight edge at
the shell opening, the uppermost one is squarish. One distinctly large
'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 tentacles long thin black.
Sometimes confused with other
similar nerites. Here's a comparison of these similar
nerite snails and how to tell them apart.
Sisters Island, Jul 06
Sisters Island, May 08
Sentosa, Nov 10
|Human uses: Where it is common,
it is often collected for food and shellcraft by coastal dwellers.
nerite snails on Singapore shores
|Other sightings on Singapore shores
East Coast-Marina Bay, Jul 20
shared by Vincent Choo on facebook.
Sentosa Serapong, May 16
shared by Ivan Kwan on facebook.
Lazarus Island, Feb 11
shared by Rene Ong on facebook.
nerite (Nerita undata) on SeaBase Life: Technical fact
- Nerita undata (Cycloneritimorpha: Neritidae) Undate Nerite by Rebecca Loh Ker, 2015, on taxo4254.
- Waved nerite
(Nerita undata) 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.
- 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.