transoceanic

Because they don't undergo transoceanic migrations, any contamination found in the animals' muscles likely reflects the waters they swim in.

"We were amazed to discover that our evolution experiment in tiny flasks had recapitulated the complex patterns that had been previously observed between bacteria and viruses collected at regional and transoceanic scales," said Borin.

Scientists believe the creatures arrived via ballast dumps from transoceanic freighters making their way to Great Lakes ports.

The projected losses come as the transoceanic waterway key to moving hundreds of billions of dollars in global trade each year expects its daily average for cargo ship crossings to slide by about 16%.

“We’re talking about building dams, the construction of an transoceanic train that also has to do with our electric generation system,” said Cerrato.