Generate a high-detail, photorealistic fantasy image featuring a central figure immersed in a grand, ancient, and technologically advanced Atlantean city, submerged deep beneath the ocean surface. The city's architecture should be intricate, crystalline, and emit a soft, ethereal bio-luminescent glow from its towering spires, grand arches, and domed habitats. Gentle, swirling underwater currents should create a dynamic sense of depth and movement. Surrounding the scene, depict vibrant, fantastical coral formations in a myriad of shapes and colors, alongside impressive ancient ruins like colossal statues or crumbling temples partially reclaimed by marine life. Elegant, iridescent schools of fish should weave through the scene, with majestic, larger sea creatures like bioluminescent jellyfish or graceful manta rays gliding in the background. The central figure should exhibit a magical water-breathing ability, perhaps subtle glowing runes or an ethereal aura, instead of a bulky mechanical apparatus. Render the image with dynamic, volumetric lighting that emphasizes the deep-sea environment and the city's ethereal glow, using a wide-angle, slightly low-angle perspective to convey immense scale and wonder.