Underwater coral reef ecosystem, shallow turquoise waters with cyan highlights, branching corals in vibrant fuchsia, lavender and goldenrod formations, school of rainbow parrotfish moving in fluid unison, dappled sunlight refracting through surface waves creating dynamic caustic patterns on sandy seabed. Medium format documentary-style composition, wide-angle perspective capturing foreground coral polyps in crisp focus transitioning to midground fish school and distant reef shelf. Morning light creating high-contrast subsurface illumination, water particles suspended in shafts of sunlight, textures of porous coral skeletons juxtaposed with smooth fish scales and rippled sand dunes. Palette dominated by electric blues with pops of warm chromatic accents. National Geographic expedition aesthetic with touches of David Doubilet's compositional balance.