"So the large things, like the docks and skiffs and the vessels that been been washed up, but also smaller pieces that become fouled and have barnacles and mussels and all sorts of things growing on them as they cross the ocean," said Dr. Cathryn Clarke Murray, a visiting scientist with the PICES North American Science Organization. She's part of a group of scientists from the U.S., Japan and Canada that are in Hawaii this week as part of a study on those creatures.