Portsmouth, Hampshire: A huge conservation effort is under way to restore native oysters to the Solent, and I was on hand to help give them a pre-release spa day Native oysters ( Ostrea edulis ) have been harvested from Chichester Harbour since Roman times, but due to overfishing, disease, pollution and competition from invasive Pacific oysters ( Magallana gigas ), the population has declined by 96% over the past century. The Solent Oyster Restoration Project is working to restore reefs by resee