Kingdom Animalia  
 Phylum Chordata  
 Class Chondrichthyes  
 Order Carcharhiniformes  
 Family Carcharhinidae  
 Genus Carcharhinus  
  Carcharhinus obscurus  (Lesueur, 1818) 
Provider: Pofeng Lee& Shoou-Jeng Joung 
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Synonyms:Carcharhinus iranzaeCarcharhinus lamiellaCarcharhinus obscurellaCarcharias macrurusCarcharinus iranzaeCarcharinus obscurusEulamia obscuraGaleolamna macrurusPrionodon obvelatusSqualus obscurus  details
Citation: 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
Character: A large, fairly slender species. Snout short to moderately long and broadly rounded. Eyes moderately large, its length 1-2.1% of total length. Gill slits moderately long, length of the 3rd 2.7-4% of total length and less than a third of 1st dorsal fin base. Rows of anteroposterior teeth in each jaw half 14-15/13-15. Upper teeth with broad, triangular, strong serrated, rather low erect to slightly oblique cusps, that smoothly merge into crown feet which have slightly coarser serrations but no cusplets. Lower teeth with erect, moderately broad, serrated cusps and tranverse or sometimes arched roots. Interdorsal ridge present. First dorsal fin moderated-sized, with a pointed or narrowly rounded apex. Origin of 1st dorsal fin usually over or slightly anterior to the pectoral free rear tips. Inner margin of 1st dorsal moderately short, a third of dorsal fin base or less. Second dorsal fin small and low, its height 1.5-2.3% of total length. Origin of 2nd dorsal fin about over anal origin. Pectoral fin large, with a narrow rounded or pointed apices. Number of total vertebral centra 173-194, precaudal centra 86-97. Tips of most fins dusky but not black or white. An inconspicuous white band on flank. 
Habitat: A common, coastal-pelagic, inshore and offshore warm-temperate and tropical shark. This species is strongly migratory in temperate and subtropical area in eastern North Pacific and western North Atlantic. Viviparous, with a yolk-sac placenta. Litter size  
Distribution: Western Atlantic including southern Massachusetts and George Bank to Florida, Bahamas, Cuba, north Gulf of Mexico, and Nicaragua. Eastern north Atlantic including Canary and Cape Verde Islands, Senegal, Sierra Leone. Western Indian Ocean including South A 
Utility: A very common offshore shark regularly caught with longline, hook-and-line and set bottom nets. It is utilized fresh, dried salted, frozen and smoked for human consumption, hides for leather, fins for shark-fin soup base, and liver oil extracted for vitam 
Name Code: 383078
  IUCN Red List:EN A2bd     Marine     
Suggested Link    The Fish Database of Taiwan  FishBase  Discover Life  World Register of Marine Species (WoRMS) 
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