Dredging+the+Ocean

http://wwf.panda.org/about_our_earth/blue_planet/problems/problems_fishing/destructive_fishing/

http://www.montereybayaquarium.org/cr/cr_seafoodwatch/issues/wildseafood_habitatdamage.aspx

http://www.brighthub.com/environment/science-environmental/articles/16762.aspx