|Kingdom Animale | Phylum Arthropoda | Subphylum Crustacea | Class Malacostrata
This crab hides under sand or mud during the day, coming out at dusk to hunt for small fish and other animal matter. Adult males have blue markings on their shells and long pincers whereas females are dull green. Extensively caught for food, they, however, do not live long once out of the water and deteriorate rapidly. (Width up to 20cm).
Their shells can frequently be found on the shore. Most are not dead crabs but merely the moults. Crustaceans moult, i.e., change and replace their shell when they grow larger. Moults are easily recognised because they are very light, the inner layers have no flesh, the eyes are transparent, and there is no bad odour. Newly moulted crabs have soft shells and are popular food items in the Americas.
From A Guide to Seashore Life by Dr Leo W H Tan and Peter K L Ng
Published by the Singapore Science Centre and sponsored by BP
@Raffles Museum of Biodiversity Research and Singapore Science Centre