A new study of the faeces of captive seals has shown that microplastics can travel high up the food chain and affect even the large predators of the oceans.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/plastic-climbing-marine-food-chain
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/hindu-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/plastics
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/non-biodegradable-waste
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/marine-life
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/marine-ecosystems
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/pollution
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environmental-security
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environment