PROMPT:
Generate a breathtakingly realistic image of an ancient underwater metropolis, hidden beneath the waves for centuries, teeming with marine life and vibrant coral. Incorporate an array of radiant colors, from emerald green and turquoise to sunshine yellow and cobalt blue, while minimizing the use of pink hues. The ruins should be shrouded in a mystical aura, with schools of bioluminescent fish darting through the decaying structures. Focus on the central temple, its entrance guarded by a colossal stone mermaid, her hair flowing like seaweed in the currents. The surrounding sea floor should be littered with ancient artifacts, treasure chests, and mysterious relics, all bathed in the soft, ethereal glow of an unseen moon.