Scientific Name
Thunnus obesus  
Thunnus obesus大目鮪
by: Guo-Shu Chen
Author (Lowe, 1839) Depth 0 - 250M
Chinese 大目鮪 Poisonous Fish No 
Family_Chinese 鯖科 Economic Fish Yes 
Family F475 Scombridae Edible Fish Yes  Chinese In Mainland China 大眼金槍魚 
Max Length 250 cm  Aquarium Fish No  Common Name 大目仔、大眼鮪、大目串、短墩、串仔(澎湖)、短鮪 
Distribution in World global   Distribution in Taiwan East、South、North、North East、ShaoLiuChew、LanI Is.、Greeb IS.、Nan Sa IS. 
Habitats Ocean、Deep Sea、Coastal  Holotype Locality Off Madeira 
Synonyms Germo obesus, Germo sibi, Neothunnus obesus, Orcynus sibi, Parathunnus mebachi, Parathunnus obesus, Parathunnus obesus mebachi, Parathunnus sibi, Thunnus abesus, Thunnus atlanticus, Thunnus mebachi, Thunnus obesus mebachi, Thunnus obesus sibi ...all 17..  
Reference 臺灣魚類誌(沈等, 1993);The Live Marine Resources of the Western Central Pacific, Vol.6(FAO, 2001)  Sun, C.L. etc. 2001 Chi-Lu Sun, Chien-Lung Huang, etc. 2001 
Specimen List ASIZP0062702. FRIP20436. FRIP21569. NMNSF00850. NTUM05135.  
Common Name Tuna; Bigeye tunny; Big eye tunny; Big-eye tunny; Coffrey; Bigeye tuna fish; Big-eye tuna; Bigeye tuna; Bigeye; Big eye; Big eye tuna; Bigeyed tuna; Bigeye Tuna 
Redlist Status VU IUCN Redlist: Vulnerable(VU) A1bd 1996-08-01   
Characteristic Body fusiform, elongate, and slightly compressed. Teeth small and conical, in a single series. Gill rakers 27 to 34 on first arch. Two dorsal fins, separated only by a narrow interspace, some large specimens with very long second dorsal and anal fins, the first with XIV to XV spines; second dorsal fin with 13 to 15 rays followed by 8 to 9 finlets; anal fin with 13 to 15 rays followed by 8 to 9 finlets; pectoral fins moderately long in large individuals, but very long in smaller individuals; interpelvic process small and bifid. Body with very small scales; corselet of larger scales developed but not very distinct. Caudal peduncle very slender, bearing on each side a strong lateral keel between 2 smaller keels. Swimbladder present. Lower sides and belly whitish; a lateral iridescent blue band runs along the sides in live specimens. The first dorsal fin is deep yellow, the second dorsal and anal fins are light yellow, the finlets bright yellow edged with black.
habitats Occur in areas where water temperatures range from 13°-29°C, but the optimum between 17° and 22°C. Variation in occurrence closely related to seasonal and climatic changes in surface temperature and thermocline. Juveniles and small adults school at the su 
Distribution Cosmopolitan in tropical and temperate waters of all oceans, but absent in the Mediterranean; a common species in Taiwan, especially in eastern and southern part. 
Utility Meat highly prized and processed into sashimi in Japan. Marketed mainly canned or frozen, but also sold fresh.