Video prompt: Calm 4K UHD video, 9s, 60fps, loopable, medium...

Video prompt: Calm 4K UHD video, 9s, 60fps, loopable, medium shot, vertical composition, single small sea turtle (no props) swimming slowly in a circle beside a colorful coral reef off Okinawa coast. Background: Small tropical fish swimming around the coral, sunlight filtering through water to form moving light beams, seaweed swaying with the current (no other characters/animals). Dynamic design: Animal action - slow circular swimming, flippers moving gently (no sudden movements); background movement - fish swimming, light beam shift, seaweed sway. Lighting: Bright underwater sunlight, cool blue tones, no text, no watermark. Style: Peaceful, tropical aesthetic. --ar 9:16 (Vertical, 1080x1920, YouTube Shorts Standard)