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A vibrant, highly detailed underwater fantasy scene in a tropical coral reef, viewed from a slightly low angle looking upward toward the ocean surface. Bright sunlight beams penetrate through clear turquoise water, creating dramatic god rays and soft caustic light patterns dancing across the scene.

At the center, a realistic yet stylized sea turtle swims gracefully upward, its flippers extended naturally, shell textured with green and brown patterns, illuminated by sunlight from above. Surrounding the turtle are multiple colorful tropical fish, including orange-and-white clownfish, yellow tang fish, and a blue-and-yellow angelfish, all swimming in different directions to create a lively, dynamic composition.

On the right foreground, a large, vivid red-orange octopus with smooth glossy skin and expressive eyes sits among coral, its tentacles curling outward with visible suction cups and soft highlights. Around it are various coral formations in bright saturated colors: yellow, orange, pink, and red branching corals, along with rounded and brain-like coral structures.

Scattered throughout the mid and background are several translucent jellyfish glowing softly in pink and purple hues, with delicate tentacles flowing downward, slightly illuminated by ambient light. Small air bubbles float upward across the entire scene, enhancing the underwater realism.

At the bottom foreground, dense coral reef textures fill the scene with high detail: sponges, sea plants, and layered coral clusters in a wide spectrum of colors. Additional sea turtles appear in the background near the seabed, adding depth.

The water surface above shows gentle waves and reflections, with a bright sun centered near the top of the composition, creating a magical, dreamy atmosphere.

Style: ultra-detailed, 3D cartoon realism, Pixar-like rendering, vibrant colors, high saturation, soft lighting, global illumination, volumetric light rays, sharp focus, depth of field, 8K resolution.

Composition: wide-angle lens, cinematic framing, balanced composition with central turtle, foreground octopus, and layered background elements for depth.

Mood: cheerful, magical, lively underwater paradise, bright and colorful.

Negative prompt: blurry, dark, low detail, dull colors, distorted anatomy, мутated animals, low resolution, noise, artifacts.