Japanese articles from the 2011 tsunami have begun to wash up on Hawaiian beaches. Free floating debris is often inhabited by opportunistic species, such as barnacles and crabs. These creatures are common in Hawaii but scientist now wonder whether this debris will act as a means of transport for invasive species as well.

http://www.msnbc.msn.com/id/49153004/ns/technology_and_science-science/#.UGHyJhzG558