Flora index
Fauna index
guide to the mangroves of singapore
Peter K L Ng and N Sivasothi (editors)
Enigma oyster
Enigmoia aenigmatica
Family Anomiidae

This strange bivalve lies on its right side and adhers to surfaces of mangrove leaves, tree tunks, breathing roots and other hard substrates via a byssus pad.

However, as juveniles they are able to detach and re-attach themselves, thus allowing for migration from one place to another during high tide by crawling and passive drifting.

Two colour morphs can be recognised, a dark-purplish form and a yellowish-golden form.

<<Back to molluscs
close-up of purple oyster on leaf
The two colour morphs of
E. aenigmatica on
Avicennia leaves
close-up of golden oyster on leaf

close-up of oyster showing notch
Right valve of E. aenigmatica
showing the deep byssus notch
through which a byssus pad
passes to attach the animal
to the substrate
What is mangrove?

The Ecosystem


Indirect uses
Potential uses

About Mangroves
in Singapore

Mangroves to visit
From "A Guide to Mangroves of Singapore", Peter K. L. Ng and N. Sivasothi (editors)
Volume 1: The Ecosystem and Plant Diversity and Volume 2: Animal Diversity
Authors: Kelvin K. P. Lim, Dennis H. Murphy, T. Morgany, N. Sivasothi, Peter K. L. Ng,
B. C. Soong, Hugh T. W. Tan, K. S. Tan & T. K. Tan
BP Guide to Nature Series published by the Singapore Science Centre, sponsored by British Petroleum
2001 Raffles Museum of Biodiversity Research, The National University of Singapore & The Singapore Science Centre