Create a surreal image of a technologically advanced underwater city populated by a diverse array of fantastical sea creatures, blending the wonders of deep-sea wildlife with cutting-edge robotics and futuristic technology.

Visualize a surreal scene unfolding deep under the ocean. Here, a technologically advanced city thrives, sculpted with metallic gleams and luminescent structures that exude an aura of the future. This undersea metropolis bustles with a fascinating array of fantastical sea creatures, each diverse in shape and form, residing harmoniously amongst towering structures. The cityscape blurs the lines between biology and technology as traces of advanced robotics weave seamlessly within the bodies of the creatures, demonstrating a perfect synergy of nature and machine. The oceanic life illuminates the city as their gleaming presence punctuates the depths. The scene blends the ethereal beauty of deep-sea ecosystems with the inspiration of high-tech innovation.