There's less than expected on the surface. Scientists are trying to find where in the ocean it's gone.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/first-its-kind-map-reveals-extent-ocean-plastic
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/national-geographic-news
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-resources
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-pollution
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/plastics
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/marine-pollution
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/marine-ecosystems
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/non-biodegradable-waste