I learned to read the currents like a book. A pocket of warm water led to a cavern rimed with small glass flowers that chattered when touched. A blackened scar on the reef revealed a path of scarred coral and shattered glass—evidence of a collision, or an explosion. The most telling clue was a ragged patch of dead reef, where the life had been stripped as clean as bone. Around it, the metal tags of numbered pods lay half-buried: 68596, 68597, 68599. 68598 was a hinge in that chain; where it stopped, others began to tell their stories too.