This report provides a detailed overview of the logistical requirements, methodology and monitoring results with regards to the oyster nurseries installed by the Wild Oysters Project in Conwy Bay restoration hub in North Wales and the Tyne and Wear restoration hub in North East England. Native oyster nurseries are a system specifically designed to house adult breeding oysters and provide a larval input into an area with no or very few wild native oysters. The methods of site selection, cage design and nursery monitoring protocols are also presented within this report. The oyster nurseries installed in the marina sites were monitored regularly throughout the duration of the project from April 2021 to October 2023, along with the associated biodiversity of marine animals interacting with the oyster nurseries. We found that the growth, survival and reproductive potential of the oysters was good across both restoration hubs. There was clear correlation between growth and time, and clear spikes in mortality that coincided with the increased water temperatures and spawning activity.
Impact Report 2025
Blue Marine drives global ocean recovery by advancing marine protection, restoring habitats, influencing policy, supporting communities and tackling overfishing, with measurable impact across 29 countries and 446,620 sq km of ocean.
27 February 2026