Hatchery reviving Britain's near-extinct local oysters

Decimated by over-fishing and pollution, British oysters could make a comeback, as a hatchery in the Channel port city of Portsmouth is helping to revive a native species. The hatchery is the first in the country to focus solely on saving oysters, without any commercial motivation, and aims to reintroduce millions of the European flat oysters (ostrea edulis), a species that is almost extinct in this region.