THUNNUS UK is a collaborative research project between The University of Exeter, The Centre for Environment, Fisheries and Aquaculture Science (Cefas) and the Tuna Research and Conservation Centre of Stanford University, USA and aims to provide a baseline understanding of the ecology of Atlantic bluefin tuna (Thunnus thynnus) in waters of the British Isles. The project is supported by the Department for Food, Environment and Rural Affairs (Defra) and the European Maritime and Fisheries Fund (EMFF).