The main production areas are in the north and west of Madagascar (IO) and the western equatorial belt (WCPO). Of the four main tuna species caught (albacore, bigeye, skipjack, and yellowfin), yellowfin tuna comprises 24% of the total tuna catch of the WCPO and about 42% of the IO tuna catch. Globally, yellowfin tuna comprise about a quarter of the total tuna catch (all species), and Asia-Pacific yellowfin tuna are more than 70% of the global yellowfin tuna catch. Smaller yellowfin tuna are mainly limited to surface waters, while larger fish are found in both surface and deeper waters, but rarely below 250m. Yellowfin tuna also lives in the Atlantic Ocean. It is found throughout the Indian Ocean (IO) and Western and Central Pacific Ocean (WCPO) except in areas where ocean depth is less than about 50m. It lives in tropical and subtropical oceanic waters, above and below the thermocline.
Yellowfin tuna is a highly migratory fish species.
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