Macrophthalmus pacificus   Dana,  1851 (Crab)
Organism information awaits expert curation
Class: Malacostraca

Image copyrights: NIO, Goa

Size: Length of carapace: 11 mm; breadth of carapace at external orbital angles: 13 mm; greatest breadth of carapace: 16 mm; breadth of front: 2 mm.

Color: Uniform grey.

Eyestalks not projecting beyond the anterolateral angles of the carapace. Sides of carapace divergent posteriorly. Merus, carpus and propodus of ambulatory legs with few hairs.

The carapace is smooth, and two-thirds as long as broad. The lateral borders are divergent posteriorly and have three teeth. The eyes do not reach the orbital teeth. On each branchial region are two longitudinal, parallel, granular eminences, with a third near the postero-lateral angle. The anterior male abdominal appendages are thick and slightly curved densely covered with barbed hairs along the outer margin. The tip is blunt and angular, and bears a brush of smooth hairs. There is almost no 'spooning' on the hairs of the second maxillipeds, which consist of numerous lobes.

Synonym (s)
Macrophthalmus pacificus Dana, 1851
Macrophthalmus pacificus Tesch, 1915
Macrophthalmus pacificus Nye, 1974

Common Name (s)
Economic Importance and Threats

Habitat:  Reef Associated, Sandy, Muddy, Coastal


• Andaman and Nicobar Islands, Nicobar Islands (Lat: 7) (Long: 93) INDIA
• West Coast INDIA
• Gujarat, Okha INDIA
• Andaman and Nicobar Islands, Nicobars INDIA
• West Bengal, Gosaba, Birajmani char INDIA (Record: 27/05/1985)
• Gujarat INDIA
• Gujarat, Balapur Reef INDIA
• East Coast INDIA

Literature Source(s)
  • 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
  • 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 -
  • Bairagi, N (1995) Ocypodidae: Decapoda: Crustacea Estuarine ecosystem series, Part 2: Hugli Matla Estuary ZSI, Calcutta 263-287 Available at - NIO, Goa
  • Gopalakrishnan, P (1970) Some observations on the shore ecology of the Okha Coast Journal of the Marine Biological Association of India Cochin, India 120(1&2) 15-34 Available at - NIO, Goa

Page last updated on:2011-02-15

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