Walmart sources over $750 million in seafood annually and its seafood business was growing 25% per year. However, global fisheries output had declined significantly. To address sustainability issues, Walmart adopted a strategy in 2005 and started working with the Marine Stewardship Council (MSC) to certify its seafood suppliers. The Fishin' Company, a major supplier of frozen fish fillets to Walmart, embraced MSC certification to secure its long-term business relationship with Walmart, despite the added complexity and costs. The case examines the Fishin' Company's salmon supply chain and alternatives for processing wild Alaskan salmon versus purchasing farmed salmon fillets from Chile, which are available year-round.