Fresh water will be carried by the ship of that travels from Europe to the east coast of North America , and therefore the mussel will be spread to the whole of Europe .
Fresh water will be carried by the ship that travels from Europe to the east coast of North America , and therefore the mussels will spread to all of Europe . Fresh water will be carried by the ship that travels from Europe to the east coast of North America , and therefore the mussel will be spread to the whole of Europe . Fresh water will be carried by the ship that travels from Europe to the east coast of North America , and therefore the mussel will be spread to all of Europe . Fresh water will be carried by ships that travel from Europe to the east coast of North America , and therefore the mussels will be spread throughout Europe .