Japan tsunami caused something unprecedented to happen in Pacific

Every spring, “pulses” of floating garbage from the Pacific trash vortex arrive on the US West Coast—and every year since 2011, more unwanted visitors from Japan arrive.

Researchers say that the devastating Japanese tsunami sent an armada of debris across the ocean, with “mega-rafts” carrying a horde of sea creatures to new territory, the Australian Broadcasting Corporation reports.

Researchers say they have detected at least 289 species transported 4,800 miles across the ocean by tsunami debris, including invasive species that could badly damage West Coast oyster and mussel fisheries.

They say it is too early to tell how many of the species will take root and push out…

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