The eelgrass Zostera marina L. once covered large areas in the Ria de Aveiro coastal but is reported locally extinct since 2010. A recent discovery of a new patch of Z. marina, locally known as “Fita”, reinitiates the history of local extinction-recolonisation episodes for this emblematic species in Ria de Aveiro Natura 2000 coastal lagoon. The FITA project proposes five passive restoration actions to bring together local stakeholders and protect the new population from eminent stressors in the short-term. FITA will gather knowledge on the local population dynamics and species features, for improving conservation in the mid-term. Finally, it will promote participatory approaches for reducing conflicts and promote sustainable use of space and natural resources in the long-term. FITA goal is to trigger action towards the protection and restoration of this vulnerable species, considered a priority habitat under EU Habitats Directive.