Underwater metropolis nestled in a bioluminescent coral reef canyon. Massive glass domes house futuristic buildings, connected by transparent tubes filled with high- speed transit pods. Genetically engineered kelp forests sway gently, providing oxygen and food. Schools of colorful fish and pods of dolphin- like creatures navigate between the structures. In the distance, a colossal holographic projection system displays important information and advertisements. Submersibles of various sizes move through the water, while cyborg merfolk tend to the exterior of the domes.