Thenus orientalis   (Lund,  1793) (Squat Lobster)
Organism information awaits expert curation
Class: Malacostraca

Image copyrights: FRDC

Size: Maximum total body length 25 cm; maximum carapace length 8 cm.

Color: Uniformly muddy gray.

Body strongly depressed and lamellate; carapace broader than long; eyes situated at outer angle of carapace; margins of carapace indented but not incised at cervical groove; carapace and abdomen studded with transverse rows of tubercles on first five segments; a slight median ridge, extending from second to fifth abdominal segment, ends in a sharp projecting point on fifth segment; fifth pair of legs in female not chelate.

Synonym (s)
Scyllarus orientalis Lund, 1793
Scyllarus orientalis Lund, 1847
Thenus orientalis White, 1847
Thenus orientalis Prasad and Tampi, 1957

Common Name (s)
• Slipper Lobsters (English)
• Sand Lobster (English)
• Flathead Locust Lobster (English)
• Bay Lobster (English)
• Bug (English)
• Common Flapjack Lobster (English)
• Flathead Lobster (English)
• Gulf Lobster (English)
• Moreton Bay Bug (English)
• Northern Bay Lobster (English)
• Sand Crayfish (English)
• Shovelnosed Lobster (English)
• Mud Lobster (English)
• Matta singi eral
• Kikat (Sindhi)
• Kako
Economic Importance and Threats
Importance:  Commercial
(Fisheries, marketed fresh, or frozen.)

Habitat:  Demersal, Sandy, Muddy


• Andaman and Nicobar Islands, Shoal Bay INDIA (Record: 01/1978-04/1978)
• Tamil Nadu (Lat: 11) (Long: 78) INDIA
• Tamil Nadu INDIA
• Karnataka INDIA
• Maharashtra INDIA
• Tamil Nadu, Gulf of Mannar INDIA
• Tamil Nadu, Chennai Coast INDIA
• Orissa INDIA
• Red Sea
• Persian Gulf
• Tamil Nadu, Kanniyakumari INDIA (Depth: 40-70 mts)
• Tamil Nadu, Parangipettai INDIA
• Gujarat INDIA
• West Bengal, Medinipur INDIA

Literature Source(s)
  • (2001) Invertebrate zoology collections Available at -
  • Ramakrishna; Sarkar, J and Talukdar, S (2003) Marine invertebrates of Digha coast and some recomendations on their conservation Records of the Zoological Survey of India ZSI, Kolkata 101(3-4) 1 Available at - NCL, Pune
  • Prasath, EB; Rahman, MK and Subramoniam, T (1994) Egg incubation and brooding behaviour of the female sand lobster Thenus orientalis (Lund) (Crustacea: Decapoda) The third Asian fisheries forum: proceedings of the Third Asian Fisheries Forum 26-30 October 1992, Singapore 480-483 Available at - Zoological Records
  • Jeffries, WB; Voris, HK and Chang Man Yang (1984) Diversity and distribution of the pedunculate barnacle Octolasmis Gray, 1852 epizoic on the scyllarid lobster, Thenus orientalis (Lund, 1793) Crustaceana (Leiden) 46 (3) 300-308 Available at - Zoological Records
  • BuOlayan, AH; Mohammed, HMA; Subrahmanyam, MNV and Thomas, BV (1998) Effect of size upon metal content of lobster (Thenus orientalis) from the Kuwait marine environment Bulletin of Environmental Contamination and Toxicology 61(2) 175-181 Available at - Zoological Records
  • 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
  • Nurul, HKM; Banu, Q and Ahmed, B (1989) Notes on stomatopod and decapod Crustacea from Chittagong coast of Bangladesh Pakistan Journal of Zoology 21(1) 83-91 Available at - Zoological Records (Bangladesh)
  • Fernando, AS and Fernando, OJ (2002) A field guide to the common invertebrates of the east coast of India Centre of Advanced Study in Marine Biology 1-258 Available at - NIO, RC Kochi
  • Debelius, H (2001) Crustacea Guide of the world 11-318 Available at - CMFRI, Kochi
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Bal, DV and Rao, KV (1984) Marine fisheries Tata McGraw-Hill Publishing Company Limited 470 pp Available at - NIO, Goa
  • Sealifebase 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 -
  • Untawale, AG; Dhargalkar, VK and Deshmukhe, GV (2000) Prioritization of potential sites for marine biodiversity conservation in India Setting biodiversity conservation priorities for India: Summary of the findings and conclusions of the biodiversity conservation prioritization project World Wide Fund for Nature - India, New Delhi (India) Available at -
  • Fischer, W and Bianchi, G (Eds.) (1984) FAO species identification sheets for fishery purposes. Western Indian Ocean (Fishing Area 51) FAO, Rome 5 Available at -
  • The Fisheries Research and Development Corporation (FRDC) Available at -
  • Dr. Kumaraguru, AK (2000) Studies on socioeconomics of Coral Reef resource users in the Gulf of Mannar coast, South India Centre for Marine and Coastal studies School of Energy, Environment and Natural Resources Madurai Kamaraj University, Madurai, India Available at -
  • Balaji,K; Thirumaran, G, Arumugam, R, Kumaraguruvasagam, KR and Anantharaman, P (2007) Marine ornamental invertebrate resources of Parangipettai coastal waters (south east coast of India) Journal of fisheries and aquatic science Academic Journals 2(5) 328-336 Available at -
  • Shanmugam, S and Kathirvel, M (1983) Lobster resources and culture potential Mariculture potential of Andaman and Nicobar Islands-An indicative survey Bulletin of Central Marine Research Institute CMFRI, Cochin 34 61-65 Available at -
  • Dholakia, AD (2004) Marine resources Fisheries and aquatic resources of India Daya publishing house 271-303 Available at - NIO, Goa
  • Roy, MK (2010) Diversity and Distribution of Crustacea Fauna in wetlands of West Bengal Journal of Environment and Sociobiology Social Environmental and Biological Association, Kolkata, India 7(2) 147-187 Available at - NIO,Goa
  • Pillai, PKM and Augustine, SK (2000) A code list of common marine living resources of the Indian seas CMFRI Special Publication No.12 CMFRI 1-115 Available at -

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