A surreal underwater metropolis with mermaids engaged in a vibrant festival

Dive into the fantastical depths of a surreal underwater metropolis where mermaids come together in a vibrant festival, creating a spectacle that transcends the imagination. This submerged cityscape is a breathtaking marvel, featuring towering structures adorned with intricate seashell patterns and bioluminescent lights that cast an enchanting glow throughout the aquatic expanse.