That's right. Stuff like this happens because there is no oxygen in the water.
It has nothing to do with the hydrocarbons or the chemical dispersants used for months earlier this year that the press and the government conspired to not let you see. Maybe this is what happens when TEH EARL, IT BE VANISHINGZ!! Or maybe this is a side effect of the magical oil spill remediating microbes as they nom nom nom the magically vanishing oil? We have our top people working on this, and I'd bet they won't let those meddling kids from UGA or USF anywhere near this site.
Nothing to see here, please move along.