Scientific Name
Triaenodon obesus  
Triaenodon obesus灰三齒鯊
by: Lab of Fish Ecol. and Evo., BRCAS
Author (Rüppell, 1837) Depth 1 - 330M
Chinese 灰三齒鯊 Poisonous Fish No 
Family_Chinese 真鯊科 Economic Fish Yes 
Family F029 Carcharhinidae Edible Fish Yes  Chinese In Mainland China 灰三齒鯊 
Max Length 213 cm  Aquarium Fish No  Common Name 沙魚、鱟鮫 
Distribution in World India Ocean to Pacific Ocean   Distribution in Taiwan South West、Tung Sa IS. 
Habitats Deep Sea、Coral、Coastal、Lagoon、
Holotype Locality Jeddah, Saudi Arabia, Red Sea 
Synonyms Carcharias obesus, Triaenodon apicalis, Trianodon obesus   
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  Taniuchi, T. 1975 Randall, J. E. 1977 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
Common Name Reef whitetip; Reef whitetip shark; Whitetip reef shark; Whitetip shark; White-tip shark; White tip reef shark; White-tip reef shark; Blunt-head shark; Blunthead shark; Light-tip shark 
Redlist Status LR/nt IUCN Redlist: Lower Risk/near threatened(LR/nt)  2000-06-30   
Characteristic A moderately slender shark species, with head very broad and flattened. Snout broadly rounded and very short. Preoral snout length subequal to internarial space and much less than mouth width. Eyes fairly small, usually with posterior notches. Spiracles usually absent. Teeth similar in upper and lower jaws. Teeth of anteroposteriors in both jaws with erect to semioblique, narrow cusps, strong, high proximal and distal cusplets, but no blades or serrations. Lateral keels on caudal peduncle absent. Upper precaudal pit transverse and crescentic. First dorsal origin well behind pectoral free rear tips, its midbase much closer to pelvic bases than pectorals. Second dorsal fin very large, its height 1/2-3/4 of 1st dorsal fin. Pectoral origin varying from under interspace between 4th and 5th gill slits to about under 5th gill slits. Anal fin about as large as second dorsal fin. Colour grey or brownish above, without a colour pattern other than variable dusky spots and brilliant white fin tips.
habitats A common tropical inshore shark of the continental shelves, usually found in shallow, clear waters. Viviparous, with 1-5 of embryos per litter. Maximum size said to be about 213 cm but adults are very rare over 160 cm. Males maturing at 104-105 cm and fem 
Distribution Indo-West and central Pacific from South Africa an Red Sea to Pakistan, India, Sri Lanka, Burma, Indonesia, Viet Nam, Taiwan, Riu Kiu Islands, The Philippines, Australia, New Guinea. Eastern Pacific from Cocos and Galapagos Islands, Panama to Costa Rica. 
Utility It is fished with floating and fixed bottom gillnets and longlines, and its flesh and liver utilized fresh for human consumption.