Digital painting of a worm's-eye view from beneath a sheet of clear ice in the Arctic sea, looking up at a mushroom girl crouched on top of the ice, medium shot. She is seen through the ice from below, crouched low on all fours like a cat ready to pounce, her palms pressed flat on the surface and her wide dark eyes fixed on a glowing silver fish swimming just under the ice near the camera. She wears a large pale blue mushroom cap with frost-white gills and tiny icicles hanging from its rim, a thick white fur parka with the hood down and mittens dangling from strings. Cracks in the ice glow faint blue, small bubbles float near the lens, and above her, green and violet aurora ribbons ripple across the black polar sky. The palette is deep navy and black with glowing ice blue, aurora green and violet, and frosty white. Smooth soft brushwork, glossy translucent highlights on the ice, inner glow and sketchy dark blue lineart.