Freshwater mussels are among the most endangered animal groups globally, with over 70% of North American species threatened or extinct. Their welfare and conservation status matters for entire river ecosystems.
Freshwater mussel welfare raises fundamental questions about invertebrate sentience. While mussel nervous systems are simple, they respond to environmental stimuli and show behavior that protects against harm. Their conservation crisis is primarily a human-caused welfare catastrophe in the ecological sense — the elimination of entire populations and species. Restoring mussel populations requires clean water, appropriate sediment quality, and presence of host fish species — ecosystem-level interventions rather than individual welfare management. Captive propagation programs for critically endangered species represent genuine conservation welfare work. The extinction of 70 species in recent decades represents irreplaceable loss from both conservation and potential welfare perspectives.