seen? This oyster with spikes is commonly seen on our rocky
shores, on boulders, rocks, jetty pillings, sea walls and other hard
surfaces. Often several individuals squashed next to one another.
Features: 3-4cm. The
two-part shell is thick and chalky. The left valve is stuck to a rock
while long, hollow spikes develop on the right valve. The spikes are
more prominent in younger animals. This is probably a defence against
predatory snails like Drills.
The spines might make it difficult for such a snail to bore a hole
in the oyster's shell. But this is no defense against determined humans.
This oyster is eaten in many parts of the wold where they occur.
Tanah Merah, May 05
Berlayar Creek, Mar 09
*Species are difficult
to positively identify without close examination.
On this website, they are grouped by external features for convenience of
oysters on Singapore shores
- 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.