Hyper-realistic DSLR photography blue dominant bright palette, World Environment Day, depth of field composition, breathtaking underwater ocean conservation scene, sharp foreground focus on a vibrant living coral reef teeming with life, intricate branching blue and cyan coral formations in crisp macro detail, colorful reef fish darting between coral branches, deep cobalt ocean water column stretching upward to shimmering turquoise surface light above, five sea turtle silhouettes gracefully ascending toward the light in soft bokeh mid-ground, scattered bioluminescent plankton particles glowing electric blue in dark water, no text no logos no human figures, 60% deep cobalt and cerulean blue, 30% rich navy and sapphire shadow, 10% bright turquoise and cyan coral accent, mirrorless camera 70mm f2.8, ultra HD 4K, 16:9