Plastics in the Sea: Occurrence and Impacts is a comprehensive reference written by renowned leaders in the field. It synthesizes existing knowledge of how mega-, macro-, micro-, and nanoplastics impact marine environments and marine life, ranging from zooplankton, fishes, and invertebrates to birds, mammals, turtles, manatees, and other megafauna. The chapters provide basic and integrated discussions of the presence, sources, and fates; methodologies for detection, chemistry, and degradation; impacts on organisms and food webs; implications for fisheries and aquaculture; policy and public engagement; and economic and legal implications of plastic pollution. Plastics in the Sea: Occurrence and Impacts is an indispensable resource for marine resource managers, ecotoxicologists, fisheries stakeholders, policymakers, and academic researchers interested in the occurrence, impacts, and mitigation of marine plastic pollution.