Marine ecological requirements and distribution of the European sturgeon (Acipenser Sturio) remain unknown, hindering the establishment of adequate conservation measures for this critically endangered diadromous fish. We applied a consensus modelling approach on the only remaining population, native from the Gironde–Garonne–Dordogne system in France and sustained by re-stocking between 2007 and 2015. Participative data from incidental catching (2012-2021) where coupled with multiple environmental factors in Bay of Biscay and Channel waters. The influence of topographic, physico-chemical, geographic, hydrodynamic and substrate factors was tested. First results show a marked influence of physico-chemical factors (e.g. sea bottom temperature) and appear to confirm that the species is mainly coastal. Distance to the source basin seems to play also an important role in the distribution of the species, allowing more reliable range predictions.