Submerged Comet: A 3D Underwater Render

Hyper-detailed 3D render of a colossal comet submerged in a crystal-clear underwater world. An icy, glowing nucleus with a luminous tail streams through the water, creating refracted light, bubbles, and trailing ice shards. Surrounding scenery includes a vibrant coral reef, swaying kelp, and a sandy seabed. Sunbeams piercing the surface cast volumetric god-rays, caustics ripple across the comet and reef, and fine particles float in the water. Realistic PBR textures for ice, rock, coral, and sand, with accurate light scattering and color dispersion. Camera at a slightly low angle near the seabed, giving a sense of scale; blue-teal palette with bright white-blue highlights on the comet, warm reef accents in orange and pink, cinematic, ultra-detailed, 3D-rendered.