The Safina Center

Koho salmon.Koho salmon.Photo taken by: Carl Safina

Some problems exist with this species' status or catch methods, or information is insufficient for evaluating. Tuna, Yellowfin – U.S. Longline (Maguro) These fish contain levels of mercury or PCBs that may pose a health risk to adults and children.

Yellowfin Tuna reach sexual maturity at a younger age (about three years) than most other tunas and grow quickly. They produce millions of eggs per spawning, and can live up to nine years. Yellowfin Tuna are found throughout the world’s tropical and sub-tropical oceans, with one population occurring in each of the Indian and Atlantic Oceans and two in the Pacific.

Abundance of Yellowfin Tuna varies among populations, but overall abundance is at a medium level. Globally longline vessels catch 15% of all tuna species including Yellowfin Tuna. Longline tuna fisheries catch large numbers of unwanted species or bycatch, including billfish, sharks, seabirds, sea turtles, and marine mammals. Management of Yellowfin Tuna fisheries in the U.S. is moderately effective.

Full Seafood Watch species report here.

This fish may have high levels of mercury that could pose a health risk to adults and children. More info here about mercury in tuna. Check out our mercury in seafood section.