The opening of the dams will have a significant impact on fish populations in the Sélune. Restoring the ecological continuity of the river will alter population flows by allowing certain amphihaline species to migrate further upstream and other species to move downstream and upstream of the dams. For many years now, as part of the ORE DiaPFC (Observatory for Research into the Environment of Diadromous Fish in Coastal Rivers), the SOERE OLA (Observation and Experimentation System for Environmental Research in Alpine Lakes) and the OFB-INRAE-Institut Agro-UPPA cluster, various INRAE units (U3E, UMR ECOBIOP and UMR CARRTEL) and OFB (DRAS) have been taking samples from numerous aquatic specimens. These samples, usually otoliths, scales, and/or fins, are then used by the scientific community to carry out various analyses and research. These samples are also collected as part of the Sélune observatory. Certified as a Biological Resource Center (BRC) by GIS IBISA, Colisa is part of the BRC4Env environmental pillar (network of Biological Resource Centers for the Environment) of the RARe infrastructure. Our catalog references these different hard tissue samples and offers a module that allows you to query our database and select the types of data that may be of interest to you. You can then export this data. This dataset does not contain any specific data, but provides a link to the COLISA (COLlection of Ichtyological SAmple) application, which allows the storage of collected samples. The COLISA application requires the creation of a user account to access the entire collection.