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Scientific Name: Portunus sanguinolentus (Herbst, 1783)
English Name: Three Spot Swimming Crab, Red-Spot Swimming Crab.
Local/Bangla Name: Teen Fota Kakra (তিন ফোঁটা কাঁকড়া), Naptune Kakra (নেপচুন কাঁকড়া), Santura kankra (সাঁতারু কাঁকড়া)
Labcode: C1901SB-04
Photo: ABR Lab
Classification:
Kingdom: Animalia
Phylum: Arthropoda
Class: Malacostraca
Order: Decapoda
Family: Portunidae
Description:
The carapace of this crab is covered in a fine, granular texture, with the regions just barely discernible. There are 9 teeth on each side of the carapace’s front edge, with the last tooth being 2 to 3 times larger than the preceding teeth. The chelae (claws) are elongated in males, with the larger chela having a conical tooth at the base of the fingers. The pollex (thumb) is ridged. The crab’s color is olive to dark green, with 3 prominent maroon to red spots on the posterior third of the carapace. This crab is easily distinguished from other species by its distinct color markings.
Habitat & Distribution in Bangladesh:
Maheshkhali, Kutubdia channel, St. Martin’s and the Sonadia Islands
Environment:
Marine (Benthic), Brackish
Other References:
Ahmed ATA, Kabir SMH, Ahmad M, Rahman AKA, Haque EU, Ahmed ZU, Begum ZNT, Hassan MA, Khondker M (Eds.) (2008) Encyclopedia of Flora and Fauna of Bangladesh, Vol. 18. Part II. Arthropoda: Crustacea. Asiatic Society of Bangladesh, Dhaka, 226 pp
Uddin MS, Chowdhury SR, Rashed MR, Singha NK, Tazim MF, Mamun MAA, Mamun A, Rahman MM, Hasan ME (eds.) (2022) Album: Marine and Coastal Fishes of Bangladesh, Department of Fisheries, Government of Bangladesh, 336 pp
