A graceful green sea turtle glides through a vibrant coral reef ecosystem in the crystal-clear waters of the Great Barrier Reef at golden hour, National Geographic quality marine wildlife art, ancient weathered shell with intricate scale patterns catching warm amber rays filtering through turquoise water, wise dark eye surveying colorful reef horizon, surrounding swaying sea fans in purple and orange, dramatic coral formations in electric blue and pink, mood of ocean ancient wisdom and reef biodiversity, vivid turquoise and warm amber palette with dramatic directional light rays streaming through water surface, low composition from below emphasizing turtle's elegant streamlined form against gradient golden and blue water, shallow depth of field with distant reef fading into luminous underwater glow, cinematic composition