image: Mytilus edulis. Outside of right valve : Belfast Harbour : Musgrave Channel, Antrim : Down, Northern Ireland : R. J. Welch, Collection : BELUM Mn23816.

Mytilus edulis (Linnaeus, 1758)
Outside of right valve : Belfast Harbour : Musgrave Channel, Antrim : Down, Northern Ireland : R. J. Welch, Collection : BELUM Mn23816.

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