The populations of freshwater pearl mussels have been declining in Ostrobothnia and some of them may have witnessed the decline themselves over the centuries. The endangered species – which can live up to 250 years of age – may see a resurgence thanks to measures taken by local environmental researchers.
Freshwater pearl mussel - Wikipedia
The freshwater pearl mussel, scientific name Margaritifera margaritifera, is an endangered species of freshwater mussel, an aquatic bivalve mollusc in the family Margaritiferidae.













