An alien, jellyfish-shaped, bioluminescent spacecraft floating silently over a brightly lit cityscape at night. The organic structure of the spaceship glows with soft, eerie lights, creating a stark contrast against the dark, stormy sky. Its tendrils and dome-like body emit an otherworldly glow, casting strange shadows and illuminating the streets below with an unsettling, otherworldly hue. The city's vibrant lights reflect off the metallic surfaces of buildings, contrasting with the alien craft's glowing, translucent textures. This surreal, hyper-realistic scene captures the chilling beauty of an extraterrestrial encounter, rendered in high contrast, vivid colors, and extreme detail, embodying a unique sci-fi aesthetic.