http://www.space.com/29609-spacex-rocket-wreckage-bahamas.html?cmpid=514630_20150609_47259316&adbid=10152875723521466&adbpl=fb&adbpr=17610706465
It's just JUNK like all the battleships, airplanes, and plastic water bottles. The oceans have been humans garbage can for probably 20 millennia :'(