Across the sun-drenched, turquoise lagoons of the southwest Pacific, a quiet evolutionary drama is unfolding beneath the surface of the water. For centuries, the vibrant coral reefs of New Caledonia and the Great Barrier Reef have been home to the turtle-headed sea snake, Emydocephalus annulatus . This marine reptile, defined by its gentle disposition and highly specialized lifestyle, is currently providing scientists with a remarkable window into how wildlife adapts to rapid, human-induced environmental degradation. Historically recognized by its bold, zebra-like bands of black and white, recent observations have revealed a startling transformation among certain populations living near urbanized coasts. In the heavily industrialized coastal waters near Nouméa, the capital of New Caledonia, the classic striped patterns of these sea snakes have almost entirely vanished. In their place, researchers have documented a dominant population of solid, jet-black individuals. This phe...