Delivered eleven citizen-science monitoring sessions at Conwy and Deganwy marinas between August 2025 and July 2026. Volunteers monitored native oyster nurseries, recorded oyster survival, growth, juvenile oyster settlement and associated biodiversity, and supported the cleaning and maintenance of the nurseries. The programme generated 117 volunteer attendances, comprising 42 first-time and 75 returning volunteer attendances, and contributed 377 volunteer hours to native oyster monitoring and restoration.