Radioactive bluefin tuna crossed the Pacific to US

FILE - This March 5, 2007 file photo shows workers harvesting bluefin tuna from Maricultura's tuna pens near Ensenada, Mexico. New research found increased levels of radiation in Pacific bluefin tuna caught off the coast of Southern California. Scientists said the radiation found in the fish came from Japan's Fukushima nuclear plant that was crippled by the 2011 earthquake and tsunami. (AP Photo/Chris Park, File)Across the vast Pacific, the mighty bluefin tuna carried radioactive contamination that leaked from Japan's crippled nuclear plant to the shores of the United States 6,000 miles away — the first time a huge migrating fish has been shown to carry radioactivity such a distance.