Ultra-realistic cinematic underwater scene. A beautiful woman and a handsome man are swimming together side by side in the deep ocean, clearly visible as the main subjects in the center of the frame. They are surrounded by a rich and vibrant marine ecosystem. Hundreds of colorful tropical fish swim around them, while a majestic sea turtle glides nearby. A giant humpback whale gracefully passes in the background, and several realistic sharks swim peacefully at a safe distance, adding scale and beauty to the scene rather than danger. The camera slowly pulls back to reveal the vast underwater world. Sunlight beams penetrate the crystal-clear blue water, creating dramatic light rays and reflections. Spectacular coral reefs, sea plants, and schools of exotic fish fill the ocean floor. The whale, sharks, turtles, and fish remain visible throughout the scene, naturally enhancing the underwater landscape. Highly detailed marine life, realistic underwater physics, natural swimming movements, photorealistic water effects, volumetric lighting, cinematic composition, wide-angle shot, deep ocean environment, vibrant yet natural colors, immersive atmosphere, National Geographic documentary style, ultra-realistic, 8K quality, masterpiece, sharp focus, professional underwater cinematography. Negative prompt, low quality, blurry, cartoon, animation, CGI look, distorted anatomy, extra limbs, cropped subjects, dark water, murky water, scary sharks, aggressive animals, missing whale, missing turtle, missing fish, people out of frame, unrealistic proportions, text, watermark, logo.