Leviathan, Thalassophobia, sea monster, massive body, scaly skin, glowing bioluminescent spots, sharp teeth, terrorizing gaze, underwater, dark ocean, coral reef, seaweed, school of fish swimming away in fear, sunlight barely penetrating the surface, ominous mist rising from the depths, eerie silence, ancient ruins submerged in the background, mysterious artifacts scattered around, cinematic composition, dramatic lighting, horror atmosphere.