She ignored it.It crushed the bodies of her friends. She forgot them.It drank the light, blinding even her miraculous eyes. It dared her to give in, to use her headlamp like some crippled dryback.She kept going, in darkness.Eventually the sea floor tilted into a great escarpment, leading into light. The bottom changed. Mud disappeared under viscous clumps of half-digested petroleum: a century of oil spills, a great global rug to sweep them beneath. Generations of sunken barges and fishing trawlers haunted the bottom, each a corpse and crypt and epitaph unto itself. She explored the first one she found, slid through shattered windowpanes and upended corridors, and remembered, vaguely, that fish were supposed to congregate in such places.A long time ago. Now there were only worms, and suffocating bivalves, and a woman turned amphibious by some abstract convergence of technology and economics.She kept going.It was growing almost bright enough to see without eyecaps. The bottom twitched with sluggish eutrophiles, creatures so black with hemoglobin they could squeeze oxygen from the rocks themselves.