text:  Seba Shively, director of the Ocean Conservancy's yearly coastal cleanup campaign, says marine debris creates serious hazards with tremendous potential for impact on wildlife from entanglement or ingestion. Consider a floating sandwich bag, some pop-off lids, and a few foam pellets. They seem fairly harmless until they become a sea turtle's final meal. And monofilament line doesn't look menacing, but it can mean a slow, excruciating death for a pelican.