A colossal floating ocean megacity built on massive interconnected floating islands bobbing on an endless turquoise sea, towering glass biodomes with kelp skyscrapers and coral-inspired architecture, solar panel arrays glinting in the sunlight, sleek flying yachts and submarine vessels navigating between islands, cascading waterfall gardens flowing into the ocean below, tiny silhouetted tourists on observation decks dwarfed by impossible maritime scale, deep azure and coral reef palette with warm golden hour sunlight filtering through translucent biodome structures, epic wide shot emphasizing monumental aquatic architecture, photorealistic, cinematic depth of field