Mussels are among the most farmed bivalves globally, and questions about their capacity for suffering are relevant to the ethics of mussel aquaculture and consumption.
Like oysters, the welfare status of mussels depends on unresolved questions about invertebrate sentience. Their simple nervous systems make it unlikely they experience suffering in the way vertebrates do, but the precautionary principle suggests treating the uncertainty with seriousness. From a practical standpoint, mussel aquaculture is widely regarded as one of the most environmentally sustainable forms of animal food production, with minimal habitat disruption and positive effects on water filtration. Welfare-conscious consumers can weigh these environmental benefits against the unresolved sentience questions.