© Copyright Photographer/SFTEP, 2002 · 0 Thunnus obesus Click on map for details about points. IDnature guides Checklist Australia Vertebrata Fish Fish species NCSM SFTEP Links We parsed the following live from the Web into this page. Such content is managed by its original site and not cached on Discover Life. Please send feedback and corrections directly to the source. See original regarding copyrights and terms of use. Australian Faunal Directory FishBase 80x5 - 240x3 - 240x4 - 320x1 - 320x2 - 320x3 - 640x1 - 640x2 Set display option above. Click on image to enlarge. © Copyright Photographer/SFTEP, 2002 · 0 Thunnus obesus 6 thumbnails  •  slide show español Overview Main identification features large eye, deep body dorsal fin and a: no long lobes c: no white border pectoral: long (can pass 2nd dorsal fin ), tip points down white bars - all solid, on rear body only Body deep; eye large; dorsal fins close together, the first with prolonged spines anteriorly, giving fin a strongly concave outline; first dorsal with XIII-XV spines; second dorsal and anal fins falcate, each followed by 8-10 finlets; pectoral fins moderately long, in fish ~110cm tip is pointed down and fin reaches past D2; fish >110cm do not have elongate D2 and A; very small scales on body; corselet of larger scales well-developed, but not conspicuous. Back metallic dark blue, lower sides and belly whitish; a lateral iridescent blue band running along sides of live fish; fish to 110cm with wide, continuous white bars on rear half of body, larger fish without bars; first dorsal fin yellow; second dorsal and anal fins pale yellow; finlets bright yellow, edged with black; tail without white rear border. Maximum size, 250 cm; all-tackle world record 197.2 Kg. Habitat: oceanic pelagic. Depth: 0-1500 m. Circumglobal in tropical and temperate seas; southern California to the mouth of the Gulf of California to Peru and the oceanic islands. Attributes Abundance: Common. Cites: Not listed. Climate Zone: North Temperate (Californian Province &/or Northern Gulf of California); Northern Subtropical (Cortez Province + Sinaloan Gap); Northern Tropical (Mexican Province to Nicaragua + Revillagigedos); Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo). Depth Range Max: 1500 m. Depth Range Min: 0 m. Diet: bony fishes; octopus/squid/cuttlefish; Pelagic crustacea. Eastern Pacific Range: Northern limit=45; Southern limit=-5; Western limit=-124; Eastern limit=-78; Latitudinal range=50; Longitudinal range=46. Egg Type: Pelagic; Pelagic larva. Feeding Group: Carnivore. FishBase Habitat: Pelagic. Global Endemism: Circumtropical ( Indian + Pacific + Atlantic Oceans); East Pacific + Atlantic (East +/or West); Transisthmian (East Pacific + Atlantic of Central America); East Pacific + all Atlantic (East+West); All Pacific (West + Central + East); TEP non-endemic; "Transpacific" (East + Central &/or West Pacific); All species. Habitat: Flotsam; Water column. Inshore Offshore: Offshore; Offshore Only. IUCN Red List: Vulnerable; Listed. Length Max: 250 cm. Regional Endemism: Island (s); Continent; Continent + Island (s); Tropical Eastern Pacific (TEP) non-endemic; Eastern Pacific non-endemic; All species. Residency: Resident. Salinity: Marine; Marine Only. Water Column Position: Mid Water; Near Surface; Surface; Water column only; Names Scientific source: Integrated Taxonomic Information System Links to other sites Fishbase Catalog of Fishes Integrated Taxonomic Information System References Briggs, J.C., 1960., Fishes of worldwide (circumtropical) distribution., Copeia, 1960:171-180. Béarez, P., 1996., Lista de los Peces Marinos del Ecuador Continental., Revista de Biologia Tropical, 44:731-741. Collette , B. B. and Nauen, C. E., 1983., Scombrids of the world. An annotated and illustrated catalogue of tunas, mackerels, bonitos and related species known to date. FAO species catalogue Vol. 2., FAO Fish. Synop. No 125, 125. Collette, B.B., 1999., Mackerels, molecular, and morphology. In Proc. 5th Indo-Pac. Fish. Conf. Nouméa, 1977. Séret B. & J. Sire. Eds., Soc. Fr. Ichtyol.:149-164. Collette, B.B., Reeb, C. and Block, B.A., 2001., Systematics of the tunas and mackerels (Scombridae)., Fish Physiology, 19:1-33. Eschmeyer , W. N. , Herald , E. S. and Hamman, H., 1983., A field guide to Pacific coast fishes of North America from the Gulf of Alaska to Baja California. Peterson Field Guide Ser. 28., Houghton Mifflin:336pp. Fischer , W. , Krup , F. , Schneider , W. , Sommer , C. , Carpenter , K. E. and Niem, V. H., 1995., Guia FAO para la Identificacion de Especies de para los fines de la Pesca. Pacifico Centro-Oriental. Volumen III. Vertebrados - Parte 2., FAO3:1201-1813. Galván-Magaña, F., Gutiérrez-Sánchez, F., Abitia-Cárdenas, L.A., Rodríguez-Romero, J., 2000., The distribution and affinities of the shore fishes of the Baja California Sur lagoons. In Aquatic Ecosystems of Mexico: Status and Scope. Eds. M. Manuwar, S.G. Lawrence, I.F. Manuwar & D.F. Malley. Ecovision World Monograph Series., Backhuys Publishers:383-398. Grove , J.S. and Lavenberg, R. J., 1997., The fishes of the Galápagos islands., Stanford University Press:863 pp. Jimenez-Prado, P., Béarez, P., 2004., Peces marinos del Ecuador continental / Marine fishes of continental Ecuador., SIMBIOE/NAZCA/IFEA tomo 1 y 2. Joseph , J. , Klawe , W. and Murphy, P., 1988., Tuna and Billfish - fish without a country., Inter-American Tropical Tuna Commission:69. Lopez , M. I. and Bussing, W. A., 1982., Lista provisional de los peces marinos de la Costa Rica., Revista de Biologia Tropical, 30(1):5-26. Love, M.S., Mecklenburg, C.W., Mecklenburg, T.A., Thorsteinson, L.K., 2005., es of the West Coast and Alaska: a checklist of North Pacific and Artic Ocena species from Baja California to the Alaska-Yukon border., U.S. Department of the Interior, U.S. Geological Survey, Biological Resources Division, 288pp. Lowe,., 1839., A supplement to a synopsis of the fishes of Madeira., Proc. Zool. Soc. London, 1839:76-92. Molina, L., Danulat, E., Oviedo, M., González, J.A., 2004., Guía de especies de interés pesquero en la Reserva Marina de Galápagos., Fundación Charles Darwin / Agencia Espeñola de Cooperación Internacional / Dirección Parque Nacional Galápagos, 115pp. Schaefer, K. M., 1999., Comparative study of some morphological features of yellowfin (Thunnus albacares) and bigeye (Thunnus obesus) tunas., Inter-American Tropical Tuna Commission, 21(7):491-516. Schaefer, K. M., 2001., Reproductive biology of tunas., Fish Physiology, 19:225-270. Acknowledgements Ross Robertson, Smithsonian Tropical Research Institute I thank Ashley MacDonald and John Pickering, University of Georgia, for technical support in building this page. 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