The latest consumer fish-buying guides by the WWF warned against eating most Vietnamese catfish because of alleged unsustainable aquaculture practices. On a sustainability scale of green, yellow, and red, the group rated Vietnamese catfish as red and not certified by international quality labels.

However, certified organically raised Vietnamese catfish received a green rating. Non-organic catfish certified by the international industry group GlobalGap was rated yellow.

Vu Van Tam, the deputy minister of agriculture in charge of fisheries, expressed surprise that the WWF would reject Vietnamese catfish after the group has been involved for years in efforts to set the industry's sustainable aquaculture standards.

"WWF