MARBEC is the largest French research unit in marine biodiversity (IRD IFREMER CNRS and University of Montpellier) with many international partnerships. MARBEC-Obs is in charge of 20 durable observatories, contributing to research and expertise on the state of coastal and marine ecosystems, biodiversity and the impact of human activities exploiting this biodiversity. The services and functionalities offered by the information systems combine modeling, statistical analysis, data management and data visualisation. MARBEC-Obs can evolve towards a virtual observatory of marine and coastal ecosystems, mainly in Mediterranean and tropical areas.