Japan's tsunami-caused nuclear disaster at the Fukushima energy complex in March 2011, in which three atomic reactors were heavily damaged, continues to wreak havoc on ecosystems - in the U.S.

The latest danger emanating from the Fukushima complex to hit our shores came not in the form of irradiated tuna, but in the form of a boxcar-sized piece of floating dock which washed ashore along a sandy Oregon beach earlier this month. The find initially excited some beachcombers, reports said, but scientists quickly began to worry that such debris was quickly becoming a whole new way to transport invasive species - crabs, seaweed and other marine organisms - to U.S. waters, further harming West Coast marine environments, The Associated Press reported.