Cinematic underwater nature-documentary style, 15 seconds. A lone diver explores a vibrant coral reef ocean environment, wearing a sleek wetsuit, diving fins, mask, and a compact oxygen tank on his back. Camera follows him smoothly from behind and the side as he glides through crystal-clear blue water.
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> **[0-4s]** Wide shot revealing a rich underwater world — colorful coral reefs, schools of tropical fish darting past, sea turtles and small reef sharks in the background, sunlight beams piercing down through the water.
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> **[4-7s]** He swims past a large octopus resting on a rock, its skin shifting color as he passes calmly, continuing forward with smooth, controlled fin movements.
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> **[7-10s]** Suddenly, a massive whale appears in the distance, slowly turning to look directly at him. He freezes mid-water, eyes widening slightly as he registers the danger of its size and proximity.
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> **[10-13s]** He calmly and swiftly moves behind a tall underwater plant/kelp formation for cover, staying still and controlled, not panicked.
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> **[13-15s]** The whale glides past rapidly just above/beside him, a powerful surge of water and bubbles trailing in its wake, camera shaking slightly from the current as it passes.
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> Realistic, breathtaking underwater cinematography, natural blue-green color grading, volumetric sunlight rays, ambient underwater sound design — bubbles, distant whale calls, muffled water movement. No dialogue, no music, no text overlay, no watermark. 9:16 vertical, 15 seconds.
