You must have seen or read the news of dead fishes or oily water accumulating at the sea coasts. Why does this happen ?

Explanation

i. It occurs mainly due to oil spills.
ii. Oil spills means the accidental release of oil into a water body from a tanker, off-shore drilling rig or underwater pipelines and walls.
iii. Oil spills affect the aquatic ecosystem as it does not allow oxygen to dissolve in water and also blocks the sunlight.
iv. These factors result in the death of aquatic animals.