Marine isopods called Limnoria - or gribbles - are related to woodlice, and eat submerged timber. Here's a limnorian crawling along its burrow.
This video is the property and copyright of Pinkeye Graphics Ltd. It was taken by Cat James. www.pinkeye.co.uk. All rights reserved. We are willing to licence this work on request - we also have several others taken in the same session.