Freshwater mussels are among the most endangered animals on Earth, facing habitat destruction, pollution, and host fish loss — with emerging questions about their sentience.
Freshwater mussels occupy a fascinating position at the intersection of conservation, ecology, and emerging welfare science. Their ecological services — filtering thousands of liters of water per day — make their conservation important for entire river ecosystems. Their welfare status is genuinely uncertain: bivalves lack centralized nervous systems but do respond to stimuli and have basic nociceptive mechanisms. The precautionary principle suggests taking their potential capacity for suffering seriously while more research is conducted. Conservation programs that restore host fish populations, improve water quality, and propagate mussels in hatcheries address both conservation and the welfare of the ecosystem they inhabit. River restoration is one of the most impactful interventions for freshwater mussel survival.