World Oceans Day is an annual event initiated in 2009 in the hope of raising peoples awareness of the importance of oceans and the protection of them. Oceans play a vital role in our life and are an organic part of sustainable development. But now our precious oceans are under threat caused by human activities: excessive exploitation, illegal and destructive fishing, marine pollution and the invasion of alien species are destroying marine ecosystems. It is hoped that World Oceans Day can be an occasion for people around the world to reflect on how to protect our common oceans.