World Ocean Day is an opportunity every year to honour the world's ocean, celebrate the products the ocean provides, such as seafood, as well as marine life itself for aquariums, pets, and also a time to appreciate its own intrinsic value. The ocean also provides sea-lanes for international trade.
Honour the ocean today, do what you can today to support the oceans of the world, even if it's only to bathe or swim in the ocean, do something with a salty mix of water out of your tap, or whatever. This is important, folks.
Especially in light of what mankind has recently done to his oceans, such as the BP oil dump in the Gulf.