A major new international project was launched this week to ensure the long-term sustainability of tuna.

The International Seafood Sustainability Foundation, which includes marine scientists, non-profit organisations and leading fish suppliers, has been set up to promote conservation and sustainable use of stocks.

ISSF participants, which include Princes, WWF and MW Brands, have pledged to share catch and purchase data with regional fisheries management organisations, to avoid selling bluefin tuna and to campaign for stronger regulation of the bluefin tuna fishery.

Although stocks of skipjack, yellowfin and albacore tuna were healthy, several species could soon become overfished, ISSF said.

"Our mission is to help ensure targeted tuna stocks will be sustained at or above levels capable of supporting maximum sustainable yield," said ISSF president Susan Jackson.