Nature and EnvironmentGermanyFreshwater pearl mussels: An ecosystem gem04:58This browser does not support the video element.Nature and EnvironmentGermanyJürgen Schneider12/01/2022December 1, 2022The freshwater pearl mussel is a globally endangered species prized for its delicate gems. Hunters, agriculture and pollution have decimated populations. But conservationists in Germany have a plan to revive them.Copy linkAdvertisement