Arcania septemspinosa   (Fabricius,  1787) (Crab)
Organism information awaits expert curation
Class: Malacostraca

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Size: Length of carapace (excluding the spines) 21 mm; breadth of carapace (excluding the spines) 22 mm; length of lateral spine 16 mm; length of cheliped 55 mm.

Color: Streaky and patchy red

Carapace bluntly rhomboidal. The surface of the carapace is finely granular in irregular patches, the granules being most distinct on the large spines. The hepatic regions are separated from the branchial regions on either side by a transverse crease or pucker, but otherwise the regions of the carapace are not clearly demarcated. The chelipeds are symmetrical and slender, and are more than twice the length of the carapace in both sexes. The true legs are slender and smooth, and the dactyli are thickly fringed with rather long hair. The first pair exceed the arm in length by their dactylus and rather more than half their propodite.

The lateral spines in adults as long as the arm, and sometimes longer. But in the young they are usually much shorter than the arm.

Synonym (s)
Cancer septemspinosus Fabricius, 1787
Arcania siamensis Rathbun, 1909
Cancer hystrix Fabricius, 1793
Iphis longipes Dana, 1852

Common Name (s)
Economic Importance and Threats

Habitat:  Demersal, Sandy


• Palk Bay INDIA
• Tamil Nadu, Gulf of Mannar (Lat: 8.5) (Long: 79) INDIA
• Andaman and Nicobar Islands, Andaman Islands (Lat: 12.5) (Long: 92.75) INDIA
• Gujarat, Gulf of Kachchh (Lat: 22.6) (Long: 69.5) INDIA
• West Bengal, Sundarbans (Lat: 21.5) (Long: 88.17) INDIA
• West Coast INDIA
• Andaman and Nicobar Islands INDIA
• Red Sea
• Persian Gulf
• Gujarat, Gulf of Kachchh INDIA (Depth: 45.72 m mts)
• Andaman and Nicobar Islands, Andamans INDIA
• West Bengal, Ganges Delta INDIA
• Tamil Nadu, Chennai INDIA
• Tamil Nadu, Chennai Coast INDIA
• Arakan Coast MYANMAR
• East Coast INDIA
• Tamil Nadu INDIA
• West Bengal (Lat: 21.16) (Long: 85.83) INDIA
• West Bengal (Lat: 21.63) (Long: 89.83) INDIA

Literature Source(s)
  • Venkatraman, K; Srinivasan, M; Satyanarayana, CH and Prabhakar D (2002) Faunal diversity of Gulf of Mannar biosphere reserve Conservation area series 15 ZSI 77 pp; VIII pla Available at - NCL, Pune
  • Chhapgar, BF (1957) Marine crabs of Bombay state Contribution No. 1 of the Taraporevala Marine Biological Station Marine Biological Station, Department of fisheries, Bombay 89 pp Available at - NIO, Goa
  • Alcock, A (1968) Materials for a carcinological fauna of India the Brachyura Oxyrhyncha The Baptist Mission Press 1 1-456 Available at - Pune University, Pune
  • Mohan, JM (1978) Ecological studies on the fauna associated with economic seaweeds of south India-1. species composition, feeding habits and interrelationships Seaweed Research and Utilization Seaweed Research and Utilization Association, Tamil Nadu 3 17 Available at - NIO, Goa
  • Subba Rao, NV and Sastry, DRK (2005) Fauna of Marine National Park, Gulf of Kuchchh (Gujarat) ZSI 79 pp Available at - NCL, Pune
  • Mandal, AK and Nandi, NC (1989) Fauna of Sundarban mangrove ecosystem, West Bengal, India Fauna of Conservations 3 35431 Available at - NIO, Goa
  • 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 -
  • Marine Biological Station, Chennai, Tamil Nadu (2003) Checklist of marine fauna of Tamil Nadu Department of Environment, Government of Tamil Nadu 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 -
  • Sealifebase Available at -
  • Deb, M and Rao, GC (1993) A check-list of the brachyuran crabs (Crustacea: Decapoda)of Bay islands Journal Of The Andaman Science Association Andaman Science association, Port Blair 8(1-2) 25-34 Available at - NIO, Goa
  • 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
  • Roy, MKD and Nandi, NC (2008) Checklist and distribution of Brachyuran crabs of West Bengal, India Journal of Environment and Sociobiology Social Environmental and Biological Association, Kolkata, India 5(2) 191-214 Available at - NIO,Goa

Page last updated on:2011-10-13

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