Flora index
Fauna index
guide to the mangroves of singapore
Peter K L Ng and N Sivasothi (editors)
Mangrove tree-dwelling crab
Selatium brockii
Family Grapsidae

up to 2.5 cm, Indo-West Pacific

A tree-dwelling species in sandy areas, it hides inside crevices and loose bark during the day. At night, it emerges to feed mainly on epiphytic algae. In some areas, hundreds of crabs may be seen, with up to 40-50 individuals on a single tree. It has a colourful body, and its eyes have a greenish tinge.
crab climbing a tree
Tree-dwelling crab emerges
on Avicennia at night to feed

close-up of crab (front view)
The mainly algivorous S. brocki
opportunistically eating an ant

<<Back to crustacea
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