Juvenile bigeye tuna often have 7-10 white unbroken stripes crossing the lower sides vertically, substantially fewer than in juvenile yellowfin tuna. Bigeye tuna are found in tropical and subtropical waters of the Pacific, Indian and Atlantic oceans. Although juvenile bigeye tuna have not been reported outside tropical waters. Bigeye tuna smaller and 20kg are mainly found with surface-dewlling schools of similar fish such as yellowfin tuna and skipjack tuna . Schools of only bigeye tuna are less common.
Adults tend to be solitary.
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