Cover image: Pictured is a fragment of expanded polyurethane foam collected from the surface waters of the South Pacific Ocean. The 3-cm fragment is colonized by tentacled terebelid worms and shelled gastropods. Andrés Cózar et al. measured the plastic debris content of ocean surface samples collected around the world and found that 88% of sample sites contained plastic debris. Total ocean plastic content, estimated between 10,000 and 40,000 tons, was less than predicted, and small plastic fragments were underrepresented in the samples, suggesting that unknown mechanisms may be removing the small fragments from ocean surface waters at a high rate. See the article by Cózar et al. on pages 10239–10244. Image courtesy of Joan Costa (Consejo Superior de Investigaciones Científicas, Madrid).