Submarine, moonlit, nighttime, ocean floor, massive circular pool, crystal clear water, rippling waves, subtle underwater lighting, majestic architecture, ancient ruins, mysterious ambiance, eerie silence, faint seaweed swaying, schools of bioluminescent fish swimming by, distant spaceship wreckage, abandoned research equipment scattered around, soft misty fog rising from the water surface, cinematic composition, 3/4 shot, low-key lighting.