Oceans are polluted by oil on a regular basis from oil spills, shipping, land run-offs and dumping of oil.
Oil spills make up about a tenth of the oil that enters the ocean. The rest tends to come from shipping travelling around the world, drains and oil dumping.
Oil spills tend to be a very local problem but can be severe to marine wildlife such as fish, birds and sea animals. Oil cannot dissolve in water and always forms a thick sludge in the water. This suffocates fish, gets caught in the feathers of marine birds stopping them from flying and blocks light from aquatic plants.
Best ways to tidy these spills up is with Oil Absorbents