Blue mussels are widely farmed on ropes and on the seabed, with welfare considerations similar to other bivalves given their uncertain sentience.
Blue mussel welfare involves the same scientific uncertainty as other bivalves. The precautionary principle suggests minimising unnecessary physical damage during harvesting and handling. Mechanical dredge harvesting causes physical damage to individual mussels, and the welfare significance of this depends on unresolved questions about bivalve sentience. From a broader environmental welfare perspective, mussel farming provides ecological benefits through water filtration and calcium carbonate sequestration. Consumer decisions should consider both individual welfare uncertainty and ecological benefits.