Chlorodiella nigra   (Forskal,  1775) (Crab)
Organism information awaits expert curation
Class: Malacostraca

Image copyrights: Matthias Schlangen

All 4 antero-lateral teeth distinctive; areolae of carapace indistinct; in most cases coloration deep blackish.
Carapace hexagonal, depressed, gastric region delimited by faint grooves and sub-divided into from 3 to 5 indistinct areolae by still fainter grooves. Anterior part of branchio-hepatic region, just inside the antero-lateral margin, with one or two low broad transverse wrinkles. The surface of the carapace quite smooth. First lobe of the antero-lateral border small, almost confluent with the rounded external orbital angle. Last two lobes usually ending in procurved spine-like points. Chelipeds in both sexes, twice or more the length of the carapace, usually quite smooth to the naked eye; a tubercle or spine on the anterior edge, and a little crenulation on the posterior edge of the arm. Inner angle of wrist strongly promounced; fingers stout, a good deal arched, markedly spoon like tip. Legs with a good deal of hair, and long fine bristles interspersed, on the dorsal aspect of the last three joints.

This is the most abundant Coral reef crab occurring in large numbers. Mostly found in branchial corals of the species Acropora, Montipora and Echinopora. Abundantly seen in dead corals than in live.

Synonym (s)
Cancer niger Forskal, 1775
Cancer clymene Herbst, 1801
Cancer nigra Forskal, 1775
Chlorodius depressus Heller, 1861
Chlorodius hirtipes White, 1848
Chlorodius nebulosus Dana, 1852

Common Name (s)
Economic Importance and Threats

Habitat:  Reef Associated, Rocky, Coastal


• Tamil Nadu, Gulf of Mannar INDIA
• Tamil Nadu, Gulf of Mannar, Manauli Island INDIA
• Lakshadweep INDIA
• Karnataka INDIA (Record: 2001-2007)
• Andaman and Nicobar Islands, South Andaman, Aberdeen Bay INDIA
• Tamil Nadu INDIA

Literature Source(s)
  • Tikader, BK (1982) The fauna of India (spiders: Araneae) ZSI, Calcutta 2(part 1-2) 1-536 Available at - NCL, Pune
  • Hussain, SM Brief report on biodiversity in the coastal areas of Pakistan p 113
  • Integrated Taxonomic Information System (ITIS) Available at -
  • Kensley, B (1981) On the Zoogeography of Southern Afrian Decapod Crustacea, with a distributional checklist of the species Smithsonian Contributions to Zoology Smithsonian Institution Press, Washington, D.C. 338 23377 Available at - NIO, RC Kochi
  • 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 -
  • Dr. Ramesh, R; Dr. Nammalwar, P and Dr. Gowri, VS (2008) Database on coastal information of Tamil Nadu Report Submitted to Environmental Information System (ENVIS) Centre, Department of Environment, Government of Tamil Nadu Institute for Ocean Management, Anna University, Chennai, Tamil Nadu. Available at -
  • Sankarankutty, C (1966) On Decapoda Brachyura from the Gulf of Mannar and Palk Bay Proceedings of the Symposium on Crustacea Marine Biological Association of India, Mandapam Camp Part I 347-362 Available at -
  • Reeflex Available at -
  • Gokul, A and Venkataraman, K (2005) Status and biology of coral associated Xanthid crabs in Gulf of Mannar Biosphere Reserve Proceedings of the National Seminar on Reef Ecosystem Remediation SDMRI Special Research Publication No.9 142-147 Available at -
  • Roy, MKD and Nandi, NC (2005) Brachyuran diversity of coral reef ecosystems in India Proceedings of the National Seminar on Reef Ecosystem Remediation SDMRI Special Research Publication No.9 220-231 Available at -
  • Dineshbabu, AP; Durgekar, RN and Zacharia, PU (2011) Estuarine and marine decapods of Karnataka inventory Fishing Chimes Mr.J.V.H. Dixitulu 30 (10-11) 20-24 Available at -
  • James, PSBR ; Thomas, PA ; Pillai, CSG and Achari Kumaraswamy, GP (1969) ´╗┐Catalogue of types and of sponges, corals, polychaetes, crabs and echinoderms in the reference collections of the Central Marine Fisheries Research Institute Bulletin of Central Marine Research Institute CMFRI, Cochin 7 1-66 Available at -
  • Roy, MKD and Nandi NC (2007) Brachyuran diversity in coastal ecosystems of Tamil Nadu Journal of Environment and Sociobiology Social Environmental and Biological Association, Kolkata, India 4(2) 169-192 Available at - NIO,Goa

Page last updated on:2011-10-10

Back to Search