I have an idea! Throw a GIANT waffle into the ocean and soak up all the water.
Move all the fishies into a temporary pond.
Re-fill the Ocean with Mountain Dew
Put the fish back in
HYPER-FISH! The speed of their swimming will filter the water! Somehow...
But seriously, I doubt the Oceans will ever be clean, the goverment has "more important things" to deal with, like fighting pointless wars. *Cough*