In April 2023, Emilie Cardona and Sandra Skiba-Cassy from INRAE (The French National Research Institute for Agriculture, Food and Environment) visited the Institute of Aquaculture to work with Matthew Sprague on the AQUAEXCEL transnational access project “MIRAGE”. The project is concerned with determining the optimal ratio of essential fatty acids (particularly eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA)) in broodstock rainbow trout in order to increase their robustness, reproductive performance and quality of their eggs. The study is needed as fishmeal and fish oil have become more expensive and are more frequently substituted with plant-based proteins and oils. The experimental work was carried out in the INRAE NuMeA experimental station located in Lees-Athas whilst the associated analytical work was carried out in the Nutrition laboratories of the Institute of Aquaculture. Emilie and Sandra speak more about the project in the following video.