Nations who fish in the Pacific tuna fishery will meet in South Korea next week to try to agree on measures to restrict the catches of some species.
Scientists have recommended to the Western and Central Pacific Fisheries Commission a cut of 30 per cent in the catch of big eye and yellowfin.
The environmental campaigners, Greenpeace, want fishing reduced by 50 per cent.
The organisation's Pacific Oceans campaigner, Lagi Toribau, says action is needed now.
"The Pacific contains last abundant tuna fishery in the entire world and unless this body does not come up with measures I guess sustaining this last tuna fishery, then we will be faced with a global food security on our hand"
Mr Toribau says he is optimistic that agreement will be reached as Pacific Island nations are demanding that fishing be reduced in order to preserve a food source and government revenue.