This Workshop was convened by the International Seafood Sustainability Foundation (ISSF) to review different approaches currently used by tuna Regional Fisheries Management Organizations' (tRFMOs: CCSBT, IATTC, ICCAT, IOTC and WCPFC) science bodies to determine stock status and disseminate stock status information. Workshop participants from all ocean regions reviewed current methodologies, identified best practices and agreed on a set of recommendations on scientific process, stock assessment, uncertainty characterization, stock status determination and communication of scientific results to managers and stakeholders.