A wide-angle, eye-level anime illustration of a majestic, sprawling castle submerged deep beneath the ocean. The grand architecture features towering spires, intricate gothic arches, and iridescent white stone walls adorned with golden filigree, all resting on a seabed of glowing bioluminescent coral and soft white sand. Schools of shimmering silver fish and gentle sea turtles swim through the open balconies and around the soaring turrets, while colossal sea anemones sway in the gentle current around the castle's base. The lighting is ethereal, with shafts of shimmering turquoise sunlight piercing through the deep blue water from the surface, creating dancing caustic patterns across the stone surfaces. The color palette is dominated by deep sapphire, cyan, and luminous gold, evoking a serene, mysterious, and magical atmosphere with floating bubbles and tiny sparkling particles suspended in the water.
