Greenpeace is calling for urgent action, saying Pacific tuna stocks are declining at an alarming rate and current protection measures are failing.
The conservation group says that was the conclusion of a ten-day meeting of the Scientific Committee of the Western and Central Pacific Fisheries Commission in Micronesia.
A Greenpeace spokesperson, Dr Cat Dorey, says there are too many industrial fishing vessels in the Pacific using destructive fishing techniques such as large purse seine nets.
Dr Dorey says the Pacific's most valuable tuna, the Pacific bluefin, is now down to just four percent of its original stock size.
She says other tuna stock are at risk unless urgent action is taken.
Greenpeace is urging Pacific Island Governments to lead by example and use sustainable fishing methods.