(Linnaeus, 1767)
The carapace has, at the epibranchial angle, a tooth or a crest emphasized on the inside by a furrow. The chelipeds have the crest on the superior margin of the palm clearly defined and generally protruding. The epibranchial angle of the carapace has a short obtuse tooth marking the extremity of the crest of the antero-lateral margin. The carapace is relatively narrow, about 1.4 times broader than long; the dorsal surface is strongly convex with the regions well indicated. The chelipeds have an acute crest on the superior margin of the palm. The ambulatory legs are without carinae on the inferior margin of the propodus. The colouration is olive brownish-green to nut-brown with large spots of irregular yellow, but symmetrically distributed and speckled with brown spots. (Serène, 1984)
Type locality: Asia.
Range: Red Sea; Mozambique - Delagoa Bay (Barnard, 1950); South Africa - Port St. Jones, Durban (Barnard, 1950); Madagascar - Nosy Bé (Serène, 1984); Mauritius; Karachi (Alcock, 1898); India - Laccadive Islands (Alcock, 1898), Bombay (Chhapgar, 1957); Sri Lanka (Alcock, 1898); Andaman Islands (Alcock, 1898, Parisi, 1916); Mergui Archipelago (Alcock, 1898); Japan - Tokyo Bay (Ortmann, 1893), Okinawa (Stimpson, 1907), Misaki, Sagami Bay, Ishigaki-jima, Goto-retto and near Tateyama (Parisi, 1916), Shimoda (Sakai, 1935), Tokyo Bay, Sagami Bay, Izu Peninsula, Tosa Bay and Nagasaki (Sakai, 1939), Hachijo-jima (Sakai, 1954), Sagami Bay (Sakai, 1965b), from Boso Peninsula to Okinawa (Sakai, 1976a), Amakusa (Yamaguchi et al., 1976), Yaeyama-retto (Miyake, 1983), Kamakura, Enoshima, Manazuru, Shimoda, Izu Peninsula, Wagu, Kii Nagashima, Kii Minabe, Kushimoto, Ashizuri-misaki and Yoron-jima (Muraoka, 1998), Ginowan, Okinawa (Shokita et al., 2000); Korea - Cheju-do (Kim, 1970, 1973); Taiwan - Taowi and Chi-lung (Lin, 1949); China - Hainan Island and Paracel Islands (Dai & Yang, 1991); Malaysia - Pinang and Kelantan (Lanchester, 1902); Philippines - Cebu (Miers, 1886); Indonesia - Ternate (Miers, 1886), Edam Island, Noordwachter Island and Ambon (de Man, 1887d), Gaspar Strait (Stimpson, 1907), Ambon (Rathbun, 1910b), Java (Parisi, 1916), west of Celebes, Pontianak; Australia - Sydney (Muraoka, 1998); Solomon Islands - Gizo (Takeda & Nunomura, 1976); New Caledonia - Ile des Pins (Takeda & Nunomura, 1976); Caroline Islands; Marshall Islands; Kiribati; Fiji (Dana, 1852, Parisi, 1916); Hawaiian Islands - Oahu (Rathbun, 1906); Society Islands (Dana, 1852); Friendly Islands (Dana, 1852); Tahiti (Sendler, 1923); Tuamotu Archipelago (Dana, 1852); low tidal mark.