We're working around the world to ensure #tuna remains renewable - for fishers, your kids, their kids and the #ocean we all love. IG: issf.official We're working globally to ensure this resource remains renewable - For fishers, your kids, their kids and the Ocean we all love. The mission of International Seafood Sustainability Foundation (ISSF) is to undertake and facilitate science-based initiatives to continuously improve the sustainability of global tuna fisheries and the health of the ecosystems that support them.