Docks that washed ashore last summer at Newport's Agate Beach and in December on Washington's Olympic Peninsula carried non-native species. Most were scraped off and destroyed.
An invasive species specialist at the science center, John Chapman, told The Oregonian (http://is.gd/uAnukO ) many organisms from Japan survived more than a year floating across the Pacific and crashing on the Northwest coast. But whether they will spread and become a problem is hard to predict.
Chapman says it's important to record marine life on tsunami debris for what he calls a "giant experiment."
Information from: The Oregonian, http://www.oregonlive.com