Oyster Spa Day: Volunteers Help Native Oysters Thrive

A significant conservation initiative is underway in the Solent to restore native oyster populations. Native oysters, historically harvested since Roman times, have faced a dramatic decline of 96% over the last century due to overfishing, disease, pollution, and invasive Pacific oysters.

The Solent Oyster Restoration Project is actively working to rebuild these vital reefs. The project involves reseeding with juvenile oysters and deploying cages of mature broodstock. These efforts are designed to release millions of larvae into the Solent.

As part of this extensive effort, 20,000 oysters were prepared for release. These oysters, originating from the River Fal in Cornwall and subsequently grown in Anglesey, underwent a critical biosecurity 'spa day'. This process ensured the removal of any harmful parasites or non-native organisms that could threaten the local ecosystem.

A team of 260 volunteers meticulously cleaned each oyster. They scrubbed off silt and algae, removed encrusting tubeworms, and prised off slipper limpets. Oysters that did not pass health checks were repurposed as 'cultch' for new larvae. The oysters were then treated with chlorine to eliminate microscopic pathogens before their journey to form the UK's largest subtidal native oyster reef.