Diver Finds Structure on Ocean Floor — Then Finds Out Why It’s There

Reaching the bottom

At nearly a hundred feet down, the ocean floor began to flatten out, revealing sweeping plains of sand broken only by ridged formations of rock and the occasional burst of sponge or sea fan. He coasted slowly along the bottom, letting the slow current drift him eastward. It was deeper than most recreational dives, but Eli had done much worse.