. Nightmarish apparition: Through the main porthole, a titanic form looms in the darkness. Tentacles as thick as tree trunks writhe and stretch towards the Nautilus. 2. Eerie glow: Glowing orbs, electric blue in color, stare at the submarine with an intensity that transfixes. The light from the Nautilus reflects off the creature's smooth, slimy skin, giving it an otherworldly appearance. 3. Relentless advance: The octopus moves with terrifying grace, its tentacles coiling and wrapping around the Nautilus like venomous snakes. The glass of the portholes cracks under the pressure, and the air becomes charged with an electric tension.