Bivalve molluscs like mussels and oysters are increasingly considered a lower-welfare food option, but questions remain about their capacity for suffering during harvesting and processing.
The welfare status of bivalves is genuinely contested. Most evidence suggests they lack the neural architecture for conscious suffering, making them among the lowest-welfare-risk animal foods available. However, uncertainty remains, and the precautionary principle suggests minimizing unnecessary stress during harvesting and processing. Chilling before opening, rapid processing, and avoiding prolonged air exposure are low-cost improvements.