The Food and Agriculture Organization of the UN (FAO) has released a technical study, titled 'Assessing Climate Change Vulnerability in Fisheries and Aquaculture: Available Methodologies and their Relevance for the Sector,' which provides an overview of vulnerability assessment methodologies and their application in the fisheries and aquaculture sector. The study outlines the need for vulnerability assessments in fisheries and aquaculture and provides an overview of concepts of and perspectives in vulnerability. It then develops a classification of assessment methodologies that distinguishes between top-down/quantitative, bottom-up qualitative, and integrated methodologies. The study further describes issues such as data availability and confidence, measures and indicators, communication of results, and good practices for vulnerability assessments.