The bunker oil spilt by Indian flagship vessel M T Dawn Kancheepuram after it collided with the Isle of Man's vessel B W Maple could persist in the environment for months or years if not removed.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/oil-sea-could-persist-environment-months-if-not-removed-itopf-study
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/new-indian-express-chennai
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/tamil-nadu
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/oil-pollution
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/indian-oil-corporation-ioc
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/marine-life
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/marine-ecosystems
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environment