alien creature, Kharaa, Subnautica, bioluminescent skin, tentacles, underwater, aquatic environment, coral reefs, alien ocean, eerie glow, translucent body, infection green spots, floating, menacing pose, detailed scales texture, slimy surface, deep sea, ambient underwater lighting, wide-angle lens, close-up, Subnautica ecosystem, survival game, science fiction, high-resolution textures, dynamic shadows, murky water, bubbles, marine life interaction, 3D rendering, photorealistic, advanced shading.