Xisha Coral Cemetery: Mermaid's Moonlight Puzzle

"These corals bleed!" Dive guide Lao Wu sliced open a thick antler coral, and pale red sap mixed into the seawater. He handed me a tungsten light: "Shine it on the skeleton, and you'll see the ancient 'Genglu patterns' carved by our ancestors." I dove to a sandy bed 15 meters deep and suddenly saw pieces of porcelain embedded in brain corals—it turned out to be fragments of Zheng He's fleet's blue and white porcelain. During a night dive, we followed a group of glowing jellyfish and unexpectedly entered the 'coral funeral zone.' Lao Wu gestured for silence: dying corals were entrusting their egg bundles to giant clams, like grandmothers passing on embroidery patterns. As we surfaced, the full moon turned the remains into silver coins, and Lao Wu hummed the Tanka song 'Anhai Melody': "White coral, red whale fall, the seabed is home to the eternal homeland..."