Taxonomy

Kingdom : Animalia
Phylum : Arthropoda
Class : Malacostraca
Order : Decapoda
Genus : Scylla
Species : serrata
Author : Forskal, 1775

Description

Size: Total length: 20.3 to 22.9 cm.
Length of carapace: 144 mm.
Breadth of carapace: 211 mm.
Length of cheliped: 345 mm.
Girth of hand: 215 mm.
Weight: 0.90 to 2.0 kg.
Color: Carapace pale brown to greenish brown, hands pinkish brown at the outer surface and dactylus of chela greenish with pinkish tinge.
Carapace transverse, broad, moderately convex, perfectly smooth and unbroken except a curved transverse ridge; front four dentate, middle two teeth of equal length; antero-lateral borders cut into nine sharp acuminate teeth of almost equal size. Hands inflated and almost smooth; palm swollen and arm with three spines on the anterior border and two on the posterior border. Legs ambulatory and unarmed, last pair paddle-like and adapted for swimming. Abdomen of male broadly triangular, outer basal of the first pair of abdominal appendages more rounded in male with denser spinules. The anterior male abdominal appendages are elegantly bent and bear hairs along one border and spinules along the other. The tip is shaped like a scapel and bears a patch of spinules.
Solitary, swimmers as well as burrowers. Adapted to salinities ranging from almost freshwater to that of seawater.