Portunus pelagicus   (Linnaeus,  1758) (Crab)
Organism information awaits expert curation
Taxonomy
Kingdom:Animalia
Phylum:Arthropoda
Class: Malacostraca
Order:Decapoda
Family:Portunidae

Image copyrights: FAO

Description
Size: Width of carapace 150 mm; length of carapace 64 mm.

Color: Carapace dark bluish in male, dark purplish in female, with pale bluish irregular mottles in both sexes; distal segments of the legs purplish in color.

Carapace broad, little convex its length a little more than half its breadth without the great lateral spines, at all ages closely covered with large miliary granules. Front cut into four teeth not counting the inner angles of the orbit of which the middle two are small and little prominent. Supra-orbital borders cut by two fissures into three lobes, the outer angle of the middle lobe being usually dentiform. Antero-lateral and posterior borders and external maxillipeds almost as in the preceding species. Chelipeds in the adult male more than 3 times, in the female and young male not quite 2 times the length of the carapace. Arm with 3 large spines on the anterior (inner) border and with one at the far end of the posterior border. Legs as in Portunus sanguinolentus. A spine at distal end of posterior border of merus of chelipeds; front composed of 4 teeth.

This species commonly rises to the surface after nightfall, swimming powerfully and purposefully, usually with the current.


Synonym (s)
Cancer pelagicus Linnaeus, 1766
Neptunus(Neptunus) pelagicus Laurie, 1906
Neptunus pelagicus Alcock, 1899
Portunus(Portunus) pelagicus Sakai, 1976
Cancer pelagicus Linnaeus, 1858
Cancer pelagicus Linnaeus, 1758
Neptunus pelagicus Kemp, 1915
Portunus pelagicus Sankarankutty, 1961
Cancer cedonulli Herbst, 1794
Cancer pelagicus Forskal, 1775
(Pre-occupied Name)
Portunus (Portunus) pelagicus var. sinensis Shen, 1932
Portunus denticulatus Marion de Proce, 1822

Common Name (s)
• Sand Crab (English)
• Raticulata Crab (English)
• Karchalo
• Reticulate Crab
Economic Importance and Threats
Importance:  Commercial
(It is a common edible crab. Its meat and soup is supposed to act as a medicine.)

Ecology
Habitat:  Benthic, Reef Associated, Estuarine, Sandy, Muddy, Coastal

Biogeography


• Andaman and Nicobar Islands, Andaman Islands (Lat: 12.5) (Long: 92.75) INDIA
• Andaman and Nicobar Islands, Andaman Islands (Lat: 10) (Long: 93) INDIA
• Tamil Nadu, Gulf of Mannar (Lat: 8.5) (Long: 79) INDIA
• Kerala, Trivandrum (Lat: 8.5) (Long: 76.9) INDIA
• Maharashtra, Mumbai (Lat: 18.98) (Long: 72.83) INDIA
• West Bengal, Sundarbans (Lat: 21.5) (Long: 88.17) INDIA
• Orissa, Mahanadi Estuary (Lat: 20.32) (Long: 86.75) INDIA
• Tamil Nadu, Mandapam (Lat: 9.28) (Long: 79.12) INDIA
• West Coast INDIA
• Andaman and Nicobar Islands INDIA
• Tamil Nadu, Gulf of Mannar INDIA
• Red Sea
• INDIA
• West Bengal INDIA
• Orissa INDIA
• Andhra Pradesh INDIA
• Tamil Nadu INDIA
• Pondicherry INDIA
• Kerala INDIA
• Karnataka INDIA
• Goa INDIA
• Gujarat INDIA
• Andaman and Nicobar Islands, Andaman Islands INDIA
• Palk Bay (Lat: 9.5) (Long: 79.25) INDIA
• Gulf of Oman
• Orissa, Chilika Lake INDIA
• Tamilnadu, Arukkattuthurai INDIA
• Tamil Nadu, Thondi INDIA (Record: 06/2005-05/2006)
• Gujarat, Gulf of Kachchh INDIA
• Gujarat, Off Veraval INDIA
• East Coast, Coromandel, Pulicat Lake INDIA
• Tamil Nadu, Chennai INDIA
• Tamil Nadu, Pamban INDIA
• Tamil Nadu, Vedalai INDIA
• Tamil Nadu, Devipattinam INDIA
• Maharashtra, Malvan (Lat: 16.08) (Long: 73.05) INDIA
• Off Goa (Lat: 15.46) (Long: 73.78) INDIA (Record: 11/1988-10/1989) (Depth: 15-35 mts)
• Tamil Nadu, Pichavaram INDIA
• West Bengal, Sandheads INDIA
• Gujarat, Gopnath INDIA
• Gujarat, Mahuva INDIA
• Gujarat, Veraval INDIA
• Tamil Nadu, Vellar Estuary INDIA
• Tamil Nadu, Parangipettai INDIA
• Tamil Nadu, Arukkattuthurai (Lat: 10.39) (Long: 79.86) INDIA (Record: 09/2007-08/2008)
• Tamil Nadu, Kodikkarai (Lat: 10.3) (Long: 79.85) INDIA (Record: 09/2007-08/2008)
• Tamil Nadu, Mallipattinam (Lat: 10.27) (Long: 79.32) INDIA (Record: 09/2007-08/2008)
• Tamil Nadu, Manalmelkudi (Lat: 10.42) (Long: 79.31) INDIA (Record: 09/2007-08/2008)
• Tamil Nadu, Adirampattinam (Lat: 9.95) (Long: 79.18) INDIA (Record: 09/2007-08/2008)
• Tamil Nadu, Thondi INDIA (Record: 07/2005-06/2006)
• Karnataka INDIA (Record: 2001-2007)
• East Coast INDIA
• Tamil Nadu, Kovalam INDIA
• Gujarat, Off Rozi INDIA (Record: 11/1972-10/1974)
• Orissa, Chilika Lake (Lat: 19.46) (Long: 85.1) INDIA
• Orissa, Chilika Lake (Lat: 19.9) (Long: 85.58) INDIA
• Tamil Nadu, Pulicat Lake (Lat: 13.41) (Long: 80.05) INDIA
• Tamil Nadu, Pulicat Lake (Lat: 13.91) (Long: 80.31) INDIA
• Kerala, Vembanad Lake (Lat: 9.5) (Long: 76.21) INDIA
• Kerala, Vembanad Lake (Lat: 10.33) (Long: 76.83) INDIA
• Andaman and Nicobar Islands, Little Andaman, Hut Bay (Lat: 10.64) (Long: 92.57) INDIA
• Andaman and Nicobar Islands, Little Andaman, Harbindar Bay INDIA
• Andaman and Nicobar Islands, Little Andaman, R.K. Pur INDIA
• Andaman and Nicobar Islands, Little Andaman, Dugong Creek (Lat: 10.75) (Long: 92.5) INDIA
• Andaman and Nicobar Islands, Little Andaman, Butler Bay (Lat: 10.75) (Long: 92.5) INDIA

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