Bigeye (Thunnus obesus) are found in the tropical and subtropical areas of the Atlantic (but not in the Mediterranean), Indian, and Pacific Oceans. Bigeye reach similar maximum sizes as yellowfin tuna. Bigeye can form either free-swimming schools or schools associated with floating objects. Juvenile bigeye will form schools with juvenile yellowfin and skipjack tunas. 

In: FAO Species Catalogue, Vol. 2. Scombrids of the World (1983). Courtesy of Fisheries and Aquaculture Department/Food and Agriculture Organization of the United Nations.
 

SPECIES CHARACTERISTICS

 Size (cm)Weight (kg)Age (yrs)
Common40-1801.4-130 
Maximum23021015
Maturity102-13525-573-4

GEOGRAPHIC LIMITS

  • From 55-60° N and 45-50° S
  • Juvenile and reproductively active adult bigeye are found in equatorial waters as well as at higher latitudes. 

SPECIES MANAGEMENT

The following four bigeye stocks are assessed and managed by the RFMOs:

See Bigeye-related News