This floating dock washed ashore near Newport. Ore. on June 5.
The dock that washed ashore in Oregon is 66 feet long and covered with an estimated ton of marine life.
An engraving on the dock allowed officials to trace it back to Japan.
Wakame, a known invasive seaweed, clinging to the "tsunami dock" on an Oregon beach.
Among the species on the Japanese dock are these exotic mussels (Mytilus edulis or M. galloprovicialis) and unknown barnacles.
A view of the mussels and barnacles that cling to the Japanese dock.
An exotic pink Japanese acorn barnacle on the dock that washed ashore in Oregon.
In this photo released by NOAA, a boat lost in the Japanese tsunami of 2011 sits onshore on a remote Canadian island. The boat was discovered Aug. 9, 2012.