Species has a combination of problems such as overfishing, high bycatch, and poor management.
Tuna, Bluefin (Hon Maguro)These fish contain levels of mercury or PCBs that may pose a health risk to adults and children. Our source of information is  We also recommend that you check local advisories.

Bluefin Tuna is the largest tuna species and one of the largest fish in our oceans, growing to 1543 pounds and over 13 feet in length.

Bluefin tuna is caught in the Pacific, Atlantic, Southern Oceans and Mediterranean and are severely depleted worldwide. All populations are being caught at rates faster than they can reproduce.

Fishers use surface gears, typically rod and reel, longlines and purse-seines to target this highly valuable species. When caught with longlines, there is bycatch of threatened and endangered species, like sea turtles, sharks, and seabirds.

Full species report here.

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