Create a photorealistic 3D render of a stylized letter submerged underwater, blending shades of periwinkle and canary yellow. The scene features swirling water currents and a bright, enigmatic light emanating from the center, creating a high-contrast, eerie atmosphere. The rippling water surface exhibits hyper-detailed liquid textures, enhanced by dramatic lighting, showcasing an ethereal underwater spectacle. Render this in breathtaking 8K resolution with an aspect ratio of 9:16, focusing on the raw, natural beauty of water dynamics and light interaction.