This map show the occurrence of flat oyster beds in Brittany region (France), in the Atlantic and Channel seas. The typology used is EUNIS 2012.\nFlat Oyster Recovery (FOREVER) is a project realized between 2018 and 2020 with funding from the European Maritime Affairs and Fisheries Fund (EAMEF). The aims of the project were to carry out an inventory and assess the state of health of the main remaining wild populations of flat oysters in Brittany. Data was collected between 2015 and 2020 by IFREMER, Litt'OBS, Cochet Environnement and Plongée Montfort. \n Data, images and project's report are also available with the DOI https://doi.org/10.17882/79821.