There's a lot that can be done to clean up our oceans. One thing is to stop draining toxins into it. Factories do it on the sly because it's so costly to go the straight and narrow, legal way about dumping their chemicals. Boats and ships cause pollution and there could be solutions so that their fuel doesn't emit so much pollutants.
Also, trash is thrown in the ocean and that must be stopped. The number one culprit when it comes to ocean pollution is plastics. Even air pollution goes into the water. from plastics. So if we stop using plastics or stop using it so much, the ocean would automatically be getting better or at least, not getting worse.
There are many things that can be done and it is time to do those things or it will be too late.