Scientific Name	Tylosurus acus melanotus   Pronounce			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.
Barcode	2012-01-15,柯慧玲,CO1,100% 2016-04-06,Yung-Chieh,CO1,100%
Common Name	Keel-jawed needle fish
Redlist Status	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.