Tell anybody that you caught a tropical skipjack tuna in Alaska's Copper River, and you are likely to get some questions regarding your mental health. The last confirmed case of a skipjack being found in Alaska can be traced back to 1981. Yet that did not stop one fisherman from pulling a skipjack from the Copper River just last month, and it is not the only strange fish to visit Alaska recently. Scientists at NOAA's Northwest Fisheries Science Center say that the unusually warm waters of the North Pacific may have "jostled" the food chain with new arrivals, affecting everything from jellyfish...
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