Brazil's Ministry of Agriculture (MAPA) spent over a year analyzing whether frozen Vietnamese tilapia posed a disease risk. In April 2025, it published its answer: the risk was "insignificant," the clearance "irreversible."

By late 2025, Brazil's largest food company, JBS, had committed to a 700-metric ton purchase of Vietnamese tilapia -- the first commercially significant flow since the federal clearance. Then the state of Santa Catarina banned it anyway.

On December 17, 2025, Santa Catarina prohibited the import, sale, and distribution of Vietnamese tilapia within its borders, citing risk from Tilapia Lake Virus (TiLV), a pathogen that can cause high mortality in tilapia populations. A state court upheld the ban -- permitting only pre-contracted shipments to land under strict sanitary conditions. VASEP publicly flagged the conflict with federal clearance on December 23.

The federal government, whose own risk analysis cleared the product, has not intervened.

TiLV in Vietnam

TiLV does exist in Vietnamese aquaculture -- confirmed by a 2022 peer-reviewed study in the Journal of Fish Diseases. MAPA's import risk analysis concluded that frozen fillets don't constitute a meaningful transmission pathway: the 90% stock mortality figure Santa Catarina's government cited applies to live fish in direct open-water contact, not to processed frozen product moving through cold-chain logistics. Santa Catarina applied that live-fish risk to a processed-food import, and a state court ruled in its favor.

What this means

Brazil imported roughly $11 million of Vietnamese tilapia in 2025 -- one of the fastest-growing bilateral flows as Vietnam's total tilapia exports surged 141% to $99 million. VASEP has warned the dispute may affect ongoing Vietnam-MERCOSUR PTA negotiations, in which Brazil is a founding member.

Sanitary and phytosanitary (SPS) barriers at the subnational level are difficult to challenge through WTO mechanisms, which operate government-to-government. In a federal system where states retain their own health and commerce powers, federal market access approval is necessary but not sufficient -- as Santa Catarina demonstrated the week Vietnamese tilapia arrived.

São Paulo has since moved -- not with a ban, but a decree signed by Gov. Tarcísio de Freitas on June 2, imposing a 7% ICMS tax on imported tilapia fillets that inadvertently swept in all imported fish and seafood, triggering pushback from the broader seafood import industry. In Brasília, PL 6331/25 -- approved by the Chamber's Agriculture Committee -- would go further, banning all tilapia imports nationally: live fish, fingerlings, frozen, filleted, processed. The bill still needs other committees, the full chamber, and the Senate.

MAPA's science hasn't changed, and Vietnam didn't need to argue for the clearance it received. What's changed is everything around it: a state ban, a state tax, and a federal bill moving through the Chamber -- all without the federal regulatory conclusion ever shifting. VASEP has already identified the more direct pressure point: a country negotiating MERCOSUR preferential access can't easily explain its states and legislators simultaneously closing the door the federal government opened. JBS's 700 metric tons already know what that gap looks like.

Most founders know their product. Few know how to get it in front of the right people. In this hands-on session, Clay + HubSpot for Startups walk you through ICP definition, prospect list enrichment, and AI-personalized outreach. You launch your first sequence before the session ends. June 18. 11am ET / 4pm GMT.

Register Before June 18