Scientific Name
Tylosurus acus melanotus  
Tylosurus acus melanotus黑背叉尾鶴鱵
by: Lab of Fish Ecol. and Evo., BRCAS
Author (Bleeker, 1850) Depth 0 - 50M
Chinese 黑背叉尾鶴鱵 Poisonous Fish No 
Family_Chinese 鶴鱵科 Economic Fish Yes 
Family F255 Belonidae Edible Fish Yes  Chinese In Mainland China 黑背圓頜針魚 
Max Length 153 cm  Aquarium Fish No  Common Name 叉尾鶴鱵、青旗、學仔、白天青旗、水針(臺東)、圓學(澎湖)、四角學(澎湖) 
Distribution in World India Ocean to Pacific Ocean   Distribution in Taiwan East、West、South、ShaoLiuChew、LanI Is.、Greeb IS. 
Habitats Ocean、Coastal  Holotype Locality Batavia [Jakarta, Java, Indonesia, Java Sea, eastern Indian Ocean] 
Synonyms Belone appendiculatus, Belone melanotus, Strongylura appendiculata, Strongylura auloceps, Strongylura melanota, Strongylura melanotus, Thalassosteus appendiculatus, Thallasosteus appendiculatus, Tylosurus melanota, Tylosurus melanotus   
Reference 臺灣魚類誌(沈等, 1993);The Live Marine Resources of the Western Central Pacific, Vol.4(FAO,1999);Fish of Japan(Nakabo, 2002)  沈世傑 編 Shih-Chieh Shen ed. 1993 Carpenter, K. E. etc. 1999 Nakabo T. 2002 
Specimen List ASIZP0054572. ASIZP0054816. ASIZP0054966. ASIZP0067565. ASIZP0080278. ASIZP0700005. ASIZP0802721. ASIZP0807412. ASIZP0912721. ASIZP0917412. FRIP20422. FRIP20499. FRIP21169. NMMBP05875. NMMBP06287. NTMP0640. NTUM05126. NTUM07264. USNM00203579.  
Barcode2012-01-15,柯慧玲,CO1,100% 2016-04-06,Yung-Chieh,CO1,100%
Common Name Keel-jawed needle fish  
Redlist Status NL Not in IUCN Redlist     
Characteristic Body elongate, rounded in cross-section. Upper and lower jaws greatly elongate and studded with sharp teeth; a conspicuous appendage sometimes present at tip of lower jaw; gill rakers absent. Anterior part of dorsal fin with a low lobe; dorsal-fin rays numerous, 24 to 27; anal-fin lobe low; anal-fin rays numerous, 22 to 24; pectoral and pelvic fins relatively short; pectoral-fin rays 13 or 14; a distinct black lateral keel on caudal peduncle; caudal fin deeply forked, lower lobe much longer than upper. Predorsal scales very numerous and tiny, 280 to 340. Body dark bluish above, silvery white below; juveniles with elevated black lobe in posterior part of dorsal fin which is lost with growth.
habitats Found in offshore and coastal waters. Feeds mainly on small fishes. 
Distribution Indo-Pacific: East Africa to the central and south Pacific. Eastern Central Pacific: oceanic islands such as the Revillagigedo, Clipperton and Cocos. It is common in waters around Taiwan. 
Utility Marketed mostly fresh. The flesh is of good quality.