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Species has a combination of problems such as overfishing, high bycatch, and poor management.
Opah – Imported Pacific, LonglineThese fish contain levels of mercury or PCBs that may pose a health risk to adults and children. Our source of information is http://seafood.edf.org/.  We also recommend that you check local advisories.

Opah is an open-ocean fish found throughout all tropical and temperate oceans. It can grow to six and a half feet in length, approximately 550 pounds in weight, and may live for 11 years.  There has has been no population assessment of Opah in the Pacific Ocean, so its abundance is unknown.

Opah is typically caught as bycatch in pelagic longline fisheries targeting tuna and swordfish. Pelagic longlines have minimal impact on bottom ocean habitat but can accidentally capture high numbers of vulnerable species, such as sea birds, sea turtles, and sharks. Many international countries do not have effective management measures in place to reduce bycatch of these vulnerable species.

Full 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 Opah. Check out our mercury in seafood section.