Question

when an accident happens in the sea due to collision of ships, there is a huge amount of oil spill in the sea .how does this affect of eco system?what spices of the marine life are affected by it and how?

Answer 1

Do you mean species?

There are many resour4cesw you can find by Googling "oil spill". For example:
http://www.evostc.state.ak.us/recovery/status.cfm