The Safina Center

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

Species has a combination of problems such as overfishing, high bycatch, and poor management.
Tuna, Bigeye (Maguro) – Atlantic (except U.S.), Longline These fish contain levels of mercury or PCBs that may pose a health risk to adults and children.

Bigeye Tuna are a large fish, growing to over 200 kg (440 lbs), and are found throughout the Atlantic, Pacific, and Indian Oceans. They grow reasonably fast, can release millions of eggs each year, and can live to 10 years. In the Atlantic Ocean, Bigeye Tuna have a medium abundance.

Longlines result in large quantities of bycatch, including threatened or endangered species such as sea turtles, sharks and seabirds. In the Atlantic, few international regulations have been implemented to reduce impacts on these non-target species.

When fishing for tuna, longlines do not typically contact bottom habitats. However, because these fisheries catch several top-predator species, there is some concern that these fisheries may affect ocean food webs and ecosystems.

Full Atlantic species report here.
Full Canada 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.