Walmart's new seafood rules could change what's in your lunch box

Walmart is tightening seafood sourcing rules, with new standards for tuna suppliers due to take effect in 2027. The policy will apply across its U.S. and Canadian stores, including Sam’s Club, and is intended to improve supply-chain tracking and curb illegal fishing, accidental catches and abandoned gear. Suppliers will need third-party certification or participation in qualifying programs to meet the requirements.