Too often, we see the open ocean like the space between stars.
We imagine a void, vast and hollow, characterized by emptiness and populated by ghosts. Water becomes a medium, a barrier, something crossed en route to something of substance. To the sea we consign the ashes of our dead, symbolically releasing them from this world as though the watery realm weren’t part of it.
It is, of course, very much part of our world, and it is far from empty. In fact, the open ocean comprises planet Earth’s most powerful bio-engine. Though its inhabitants can barely be seen and have only recently come to science’s attention, they form an integral part of the marine biosphere. They undergird the valuable resources human beings extract from the ocean—resources we’ve come to depend on.…