Charybdis truncata   (Fabricius)  1798 (Crab)
Organism information awaits expert curation
Class: Malacostraca

Transverse ridges of carapace faint. A large red impermanent spot on either branchial region.

Carapace length slightly exceeds two-thirds of the extreme breadth. Carapace covered with a dense short tomentum, moderately convex, the regions ill defined. The front is cut into eight teeth (including the inner orbital angles) of which the middle four are broadly triangular and almost acute. Antero-lateral borders cut into six teeth, of which the second is the smallest, and the 6th though more spine like-is hardly more prominent than those in front of it. The posterior borders of the dorsal surface of the carapace is practically straight and forms an obtuse angle of junction with either postero-lateral border. Chelipeds not much more than twice the length of the carapace, their upper surface more or less granular, their under surface with smooth-worn squamiform markings. Arm with two more enlarged and one or two less enlarged spines on the anterior border, and one at the far end of the posterior border. Wrist and 3 spinules on the outer angle and a large spine at the inner angle. Hand inflated, strongly 6 or 7 costate- the costae granular, and with 3 small spines on the upper surface. The merus of the last pair of legs are nearly as long as broad and has the usual spine on the posterior border. In both sexes the 2nd and 3rd abdominal terga are carinate, the 2nd strongly and sharply so. The 6th tergum of the male is truncate triangular, the sides being very slightly sinuous.

The size and shape of the teeth on the antero-lateral edge are not constant.

Synonym (s)
Portunus truncatus Fabricius 1798

Common Name (s)
Economic Importance and Threats

Habitat:  Sandy


• Tamilnadu, Arukkattuthurai INDIA
• Tamil Nadu, Chennai INDIA (Record: 2003)
• Tamil Nadu, Gulf of Mannar INDIA (Record: 2003)

Literature Source(s)
  • Jeyabaskaran, R; Wafar, S and Wafar, M (2002) CD on Brachyuran Crabs of West Coast, India Available at -
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Available at -
  • Marine Biological Station, Chennai, Tamil Nadu (2003) Checklist of marine fauna of Tamil Nadu Department of Environment, Government of Tamil Nadu Available at -
  • Varadharajan, D; Soundarapandian, P; Dinakaran, GK and Vijakumar, G (2009) Crab Fishery Resources from Arukkattuthurai to Aiyammpattinam, South East Coast of India Current Research Journal of Biological Sciences Maxwell Scientific Organization 1(3) 118-122 Available at -

Page last updated on:2010-12-28

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