Futuristic and Underwater Scene Concepts

Imagine a serene, futuristic library on an alien planet, filled with glowing holographic books and strange, beautiful flora. How about a breathtaking view of a vibrant, bioluminescent coral reef at twilight, teeming with exotic fish and glowing marine life, all beneath a surface shimmering with the last rays of the setting sun? how about a vibrant, whimsical underwater city, bustling with marine life and glowing coral structures, where mermaids and other fantastical sea creatures gracefully navigate illuminated pathways?