Bacterial ooze is growing on a hay bale placed at 3,200 meters on the deep seafloor for a carbon sequestration experiment. This large bale of “corn stover,” four feet by four feet by eight feet in size, was placed on the seafloor in 2009. Over the years, MBARI's benthic biology group has been studying the decomposition of this bale by microbes and seafloor scavengers. The stover is covered in a white biological material that looks like something from a horror movie! It could be a strangely-formed bacterial mat.⠀