PROMPT:
A whimsical underwater metropolis inhabited by anthropomorphic sea creatures, set amidst a kaleidoscope of vibrant colors, with iridescent coral reefs, glittering gemstones, and radiant seaweed forests, illuminated by soft, luminescent glow of jellyfish lanterns, with a majestic octopus mayor standing at the entrance of an intricately carved, pearlescent palace, surrounded by a school of rainbow-hued fish, while a bright blue, three-story tall seahorse-shaped trolleybus glides by in the background, with a banner reading "Celebrate Intergalactic Friendship Day" in bold, curly, sparkling letters.