Scientific Name
Rhizoprionodon acutus  
Rhizoprionodon acutus尖頭曲齒鯊
by: Lab of Fish Ecol. and Evo., BRCAS
Author (Rüppell, 1837) Depth 1 - 200M
Chinese 尖頭曲齒鯊 Poisonous Fish No 
Family_Chinese 真鯊科 Economic Fish Yes 
Family F029 Carcharhinidae Edible Fish Yes  Chinese In Mainland China 尖吻斜鋸牙鯊 
Max Length 175 cm  Aquarium Fish No  Common Name 沙條、尖頭沙、尖頭曲齒鮫 
Distribution in World global   Distribution in Taiwan West 
Habitats Benthos、Estuary、Coastal  Holotype Locality Jeddah, Saudi Arabia, Red Sea 
Synonyms Carcharhinus acutus, Carcharhinus macloti, Carcharias aaronis, Carcharias acutus, Carcharias crenidens, Carcharias eumeces, Carcharias sorrahkowa, Carcharias sorrakowah, Carcharias walbeehmi, Carcharias walbeehmii, Carcharias walbenii, Cynocephalus acutus, Hypoprion acutus ...all 28..  
Reference 臺灣魚類誌(沈等, 1993);中國動物誌-圓口綱及軟骨魚綱(朱等, 2001);FAO Species Catalogue, Vol.4 Sharks of the world  Nair, K.P. 1976 Compagno, L.J.V. 1984 Compagno, L.J.V. 1984 沈世傑 編 Shih-Chieh Shen ed. 1993 朱元鼎, 孟慶聞 等編 2001 
Specimen List ASIZP0800907. BPBMI18665. NMMBP06360. NTMP0671. NTUM01634. NTUM01883. NTUM07742. NTUM07743. USNM00191192.  
Common Name Sharp nosed shark; Sharp-nosed milk shark; White-eye shark; Yellow dog shark; Walbeehm's sharp-nosed shark; Fish shark; Milkshark; Longmans dogshark; Grey dog shark; Milk shark 
Redlist Status   2003-04-30   
Characteristic Prenarial snout length 4-5.4% of total length. Teeth not well-differentiated between sexes. Total tooth rows usually 25/24. Position of 1st dorsal origin usually over or slightly in front of pectoral free rear tips. Second dorsal origin ranges from above last third of anal base to over its insertion. Length of pectoral anterior margin usually equal to or shorter than 1st dorsal length from origin to free rear tip. Total number of vertebral centra 121-162, precaudal centra 55-79. Colour grey, grey-brown or purplish brown above, pale below, pectoral fins with a light margin.
habitats An abundant inshore and offshore shark of continental shelves, at depth of a metre or less down to about 200 m. Viviparous, with a yolk-sac placenta. Litter size 1-8. Gestation period estimated to be about a year. Maximum size 178 cm, but most adults smal 
Distribution Eastern Atlantic from Madeira and Mauritania to Angola. Indo-West Pacific from South Africa and Red Sea to Pakistan, India,Malaysia, Indonesia, Thailand, China, Taiwan, Japan, the Philippines, Australia. 
Utility This is one of the most abundant species. It is caught with longline, hook-and-line, bottom trawls, and probably other gear. It utilized fresh and possibly dried salted for food and for fishmeal.