Well the ocean is kind of a big deal as it is the biggest driver of weather outside of the sun itself. And there's lots of other bad shit as you mentioned, this is just a recent article in sharing. If you want comprehensive stuff follow the link at the bottom of the OP.

Algae blooms provide roughly 70% of the oxygen we breathe so I think the ocean is pretty -blam!-ing important

I don't like how many republicans exist.