A bed of wild mussels growing offshore from Great Barrier Island, New Zealand. As well as growing on rocks and wharf piles, mussels can attach to one another to form beds (or reefs) such as this one.
A bed of wild mussels growing offshore from Great Barrier Island, New Zealand. As well as growing on rocks and wharf piles, mussels can attach to one another to form beds (or reefs) such as this one.