The international symposium on “Inland Fisheries and aquaculture: advances in technology, stock assessment and citizen science in an era of climate change” was organized in conjunction with the thirty-first session of the European Inland Fisheries and Aquaculture Advisory Commission in Killarney, Ireland on 20–21 June 2022. The symposium was organized by Inland Fisheries Ireland and the Department of the Environment, Climate and Communications. The symposium was attended by 105 participants from 14 countries. The main documentation comprised six invited papers and 35 experience papers and 15 posters. The symposium had five major themes, which were: (i) Inland fish stock assessment, (ii) Developments in freshwater fish monitoring technologies with an emphasis on non-destructive methods, (iii) The problems and challenges of climate change and its impacts on inland aquatic resources and fisheries, (iv) Citizen science, and (v) Aquaculture - traditional freshwater systems vs recirculation systems. The symposium provided valuable networking opportunities for the participating scientists, especially young scientists could share their research findings. Many promising studies and innovative technologies and methodologies were presented. This Occasional Paper in conjunction with a special issue of Fisheries Management and Ecology represents the proceedings of the symposium. The thirty-first session of EIFAAC, held in Killarney from 22 to 24 June 2022, discussed and endorsed the conclusions and recommendations from the symposium.