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Species: Thunnus alalunga, Albacore tuna

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body deepest under origin D2
C: rear edge white
25-31 gill rakers
pectoral: very long, passes D2, tip straight

Thunnus alalunga (Bonnaterre, 1788)

Albacore tuna

Body elongate, fusiform, moderately compressed; greatest body depth at about origin of 2nd dorsal fin; no fatty eyelid; teeth slender, conical; top of tongue with 2 cartilaginous ridges; 25-31 gill rakers; 2 dorsal fins, barely separated; 1st dorsal XII-XVI; 8-9 finlets after dorsal and anal fins; pectoral fin very long (reaches well past 2nd dorsal base) and with straight point; short, forked bony process between pelvic fins; 1 large + 2 small keels on tail base; tail fin deeply forked; indistinct scaly corselet on front of body; small scales cover body behind corselet; lateral line complete, front covered by corselet.

Faint iridescent blue stripe along flank; first dorsal deep yellow; second dorsal and anal light yellow; anal finlets dark grey; tail grey, with white rear border.

Size: 152 cm.

Habitat: oceanic.

Depth: 0-600 m.

Circumglobal, temperate; Alaska to the Gulf of California and the Revillagigedos, the Galapagos and to southern Peru.

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  • Marine Only
  • Marine
  • Offshore
  • Offshore Only
Water Column Position
  • Mid Water
  • Surface
  • Water column only
  • Near Surface
  • Water column
FishBase Habitat
  • Pelagic
Feeding Group
  • Carnivore
  • Data
  • Bony fishes
  • Pelagic crustacea
  • Data
  • Octopus/squid/cuttlefish
Egg Type
  • No data
  • Pelagic
  • Pelagic larva
Global Endemism
  • East Pacific + all Atlantic (East+West)
  • East Pacific + Atlantic (East +/or West)
  • All species
  • TEP non-endemic
  • "Transpacific" (East + Central &/or West Pacific)
  • All Pacific (West + Central + East)
  • Circumtropical ( Indian + Pacific + Atlantic Oceans)
Regional Endemism
  • Eastern Pacific non-endemic
  • Tropical Eastern Pacific (TEP) non-endemic
  • Continent + Island (s)
  • Island (s)
  • Continent
  • All species
  • Vagrant
Climate Zone
  • Northern Subtropical (Cortez Province + Sinaloan Gap)
  • South Temperate (Peruvian Province )
  • North Temperate (Californian Province &/or Northern Gulf of California)
  • Antitropical (North and South temperate)
  • Equatorial (Costa Rica to Ecuador + Galapagos, Clipperton, Cocos, Malpelo)
  • Northern Tropical (Mexican Province to Nicaragua + Revillagigedos)
IUCN Red List
  • Near threatened
  • Listed
  • Not listed
Length Max
  • 152
Depth Range Min
  • 0
Depth Range Max
  • 600