Imagine an ancient underwater city inhabited by majestic mermaids and mythical sea creatures, all living among the ruins of a long-forgotten civilization. The city is illuminated by glowing bioluminescent plants and colorful coral, creating a mesmerizing and fantastical scene straight out of a fairy tale. In the center of the city, an old, wise sea turtle serves as the guardian of this mystical realm, watching over the inhabitants with a knowing gaze. Capture this enchanting blend of old, underwater wonders, fantasy, and mythology in a single breathtaking image.

Visualize a submerged, archaic city located deep under the ocean waves, where theatrical mermaids of varied descents and magical marine fauna reside inside the remnants of a bygone culture. This city glows due to the presence of bioluminescent flora and multicolored corals, forming an entrancing and unreal landscape reminiscent of a fable. In the heart of the city, a venerable, insightful sea turtle plays the role of steward of this mystical dominion, supervising its residents with a gaze full of wisdom. Illustrate this captivating blend of ancient underwater marvels, fantasy, and mythology in a single awe-inspiring image.