(Linnaeus, 1758)
Length of carapace about two thirds its width, its surface generally smooth, clypeiform expansions of carapace with broad teeth, typically developed, ambulatory legs are largely concealed in flexion below this structure; posterior border with prominent spines, not remarkably produced; front composed of two rounded teeth separated medially by a V-shaped sinus and provided externally with small accessory tubercles at their bases. The longitudinal septum of the prolongated portion of the endostome can be seen extending between the lamellar processes of the first pair of maxillipeds.
Colouration: Upper orbital margins with an incomplete chocolate red loop, outer faces of cheliped palm and carpus each with a similarly coloured ocellated spot. (Türkay 1995)
Type locality: Asia.
Range: Red Sea (Galil, 1997a); Persian Gulf (Alcock, 1896); Sri Lanka - (Alcock, 1896), Gulf og Manaar (Galil, 1997a); Andaman Islands (Alcock, 1896); Gulf of Martaban; Mergui Archipelago (Alcock, 1896); West Malay Peninsula (Galil, 1997a); Japan - (de Haan, 1837, Galil, 1997a), Kochi (Ortmann, 1892), Okinawa (Stimpson, 1907), Shimoda (Sakai, 1935), Tateyama Bay, Sagami Bay, Shimoda, Nanki Shirahama and Nagasaki (Sakai, 1937a), Amakusa (Miyake et al., 1962, Yamaguchi et al., 1976), Sagami Bay (Sakai, 1965b), Tokyo Bay, Sagami Bay, Izu Peninsula and southward to coast of Kyushu (Sakai, 1976a), Tanabe Bay (Miyake, 1983), Oshima Passage, Amami-Oshima (Takeda, 1989), Nakagusuku Bay, Okinawa-jima (Takeda & Shikatani, 1990); Korea - Pusan (Kamita, 1941); China - Fuzhou and Xiamen (Shen, 1940b), Guangdong including Hainan Island, Fujian (Dai & Yang, 1991), Shantou (Galil, 1997a); Hong Kong (Stimpson, 1907, Shen, 1931, Galil, 1997a); Taiwan - Su-ao, Chi-lung, Heng-ch'un, Hsiak'unhsen, Tingch'ieting, and Lu-kang (Lin, 1949), Kaohsiung and Taiwan Strait (Galil, 1997a); South China Sea - (Galil, 1997a), Nansha Islands (Chen & Xu, 1991); Singapore (Nobili, 1903c); Philippines - Panay, Davao Gulf, and SW Luzon (Galil, 1997a); Borneo - Sandakan (Galil, 1997a); Indonesia - Ambon (de Man, 1888d), Saleh Bay (Ihle, 1918), Java, Moluccas and Ambon (Galil, 1997a); New Guinea - Humboldt Bay (Galil, 1997a); Australia - north-west Australia (Rathbun, 1924c), Shark Bay, Dampier Archipelago, Maud Landing, Carnarvon, Dorre Island, and Swan River Esturary (Tyndale-Biscoe & George, 1962), Sydney, Bribie Island, Maroochy River mouth, Moreton Bay, Smoky Cape, Tin Can Bay, off Cape Moreton, Weipa, Gulf of Carpentaria, and Yirrkala (Galil, 1997a); New Caledonia (Galil, 1997a); Samoa (Ortmann, 1892); 8-120 m.