The advent of human civilization has created opportunities for organisms to raft on floating artifacts , which may be more durable than natural floating objects . This phenomenon was noted following the 2011 Tōhoku tsunami in Japan , with about 300 species found to have been carried on debris by the North Pacific Current to the west coast of North America ( although no colonizations have been detected thus far )
2011 Tōhoku tsunami
2011 Tōhoku earthquake and tsunami
Oceanic dispersal