Imagine a futuristic cityscape located deep underwater, where robotic sea creatures roam the streets alongside sleek, metallic buildings. What kind of advanced technology and innovative designs would you incorporate into this unique and captivating scene?

Create a detailed visual of a futuristic underwater cityscape. The cityscape should feature sleek, metallic buildings with awe-inspiring and innovative architectural designs that communicate advanced technology. Robotic sea creatures of diverse shapes and forms should be roaming the streets of this city, adding to the unique and captivating atmosphere. The city's lighting should also be designed in a way that it creates a glowing contrast to the dark, deep underwater surrounds to highlight the cityscape. Perhaps, incorporate elements like translucent walkways or holographic signage, to depict a truly advanced society.