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Squalus japonicus Ishikawa, 1908
JAPANESE SPURDOG
Life   Vertebrata   Fish   Squalidae   Squalus


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Kingdom Animalia  
 Phylum Chordata  
 Class Chondrichthyes  
 Order Squaliformes  
 Family Squalidae  
 Genus Squalus  
  Squalus japonicus    Ishikawa, 1908 
Provider: Pofeng Lee& Shoou-Jeng Joung 
hierarchy tree    download xml    download txt    Chinese Page    
Citation: 臺灣魚類誌(沈等, 1993); 李柏峰(2003)碩士論文; 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: Body fairly slender. Snout angular, broad-based but narrow-tipped, and very long, preoral snout about 1.5 to 1.9 times mouth width, eyes closer to first gill slits than snout tip; nostrils closer to mouth than snout tip. Two dorsal fins with ungrooved, large spines, first dorsal fin height less than 2/3 of its length from origin to base. First dorsal spine moderately long, much less than fin base; second spine long, slightly lower than fin; first dorsal fin anteriorly situated, with fin origin over pectoral inner margins and spine origin over or slightly behind pectoral rear tips; second dorsal markedly smaller than first; pectoral fins broad and semifalcate; pelvic midbases about equidistant between first and second dorsal bases; caudal fin narrow-lobed and long, with long ventral lobe and strongly notched postventral margin. No anal fin. Precaudal pits strong. Lateral trunk denticles tricuspidate and with weakly scalloped posterior borders in adults. Colour: no white spots present on sides of body, dorsal fins with white edges, caudal without dark markings. 
Habitat: Maximum total length 91 cm, females mature at 79 cm. A common but little known temperate and tropical dogfish of the outer continental and insular shelves and uppermost slopes at 150 to 300 m depth, presumably on or near bottom. 
Distribution: Northeast off Taiwan; Western North Pacific: Southeastern Japan and East China Sea, including the Republic of Korea and the Philippines. 
Name Code: 383219
  IUCN Red List:DD       Marine     
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http://www.fishbase.org/Summary/speciesSummary.php?genusname=Squalus&speciesname=japonicus ---> http://www.fishbase.org/summary/Squalus-japonicus.html
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Updated: 2020-01-29 02:48:14 gmt
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