Freshwater pearl mussels are among the most endangered animals on Earth, with their welfare as individuals inseparable from the clean cold water habitats that sustain both them and the salmon populations they depend on.
Freshwater pearl mussel welfare is inseparable from the health of the river ecosystems they inhabit and the salmon populations they parasitize for larval development. Mussels in degraded rivers experience the chronic stress of inadequate oxygen and high sediment loads that impair filter feeding. Their conservation depends entirely on the ecological restoration of their river habitats — making pearl mussel welfare advocacy inherently an argument for clean rivers and salmon conservation simultaneously.