Underwater Alien Bioluminescent City

Vast underwater alien city built into and around enormous coral-like organic structures on an ocean floor of an extraterrestrial world, the architecture consisting of flowing biomorphic buildings that appear grown rather than constructed — smooth curved walls in pearlescent materials that shift between pale blue, soft pink, and iridescent silver depending on the viewing angle. The city is illuminated entirely by bioluminescence: building surfaces pulse with gentle rhythmic light in cyan and turquoise, pathway markings glow in warm amber along the ocean floor, and large jellyfish-like organisms drift above the city serving as living lanterns casting soft diffused light downward in pools of pale violet. Alien inhabitants are visible as graceful elongated humanoid silhouettes with flowing translucent appendages, swimming between structures with fluid movements suggesting an aquatic species perfectly adapted to their environment. The water is crystal clear with exceptional visibility showing the city extending into the deep blue distance where structures fade into darker waters, tiny particles and micro-organisms floating in the water column catching bioluminescent light like underwater stars. Massive organic archways connect building clusters with ribbed structures resembling the inside of seashells, their undersides glowing with patterns that could be decorative or functional signage. The ocean floor features alien flora: swaying kelp-like plants in deep purple, anemone formations in electric orange, and ground-covering organisms in bioluminescent green. Rendered from a mid-water swimming perspective with a 24mm wide-angle lens at f/5.6 providing expansive city view, the color palette entirely cool-toned with bioluminescent warm accents creating an otherworldly serene atmosphere.