Seafood is a key element in global food systems, necessary to the billions of people who depend on fisheries and aquaculture for nutrition and livelihoods, yet unsustainable practices continue as a changing climate further exacerbates environmental and social concerns. For 25 years Monterey Bay Aquarium has assessed the environmental impact of fisheries and aquaculture supplying the US market, and through our Seafood Watch program we have established a consumer and business demand for sustainable sources. This presentation will review our learnings to date, including persistent limiting factors among the aquaculture systems we have assessed, understanding the role of governance, social and other underlying issues impeding sustainability, and the role of collaboration and engagement along the entire supply chain.