Create a terrifying underwater scene featuring a colossal sea monster emerging from the depths. The creature has long, snake-like tentacles with sharp, spiked edges, and its massive body is covered in rough, barnacle-encrusted scales. Its glowing, yellow eyes pierce through the murky water, and its gaping maw is filled with rows of jagged teeth. The sea monster looms over a sunken shipwreck, its tentacles wrapping around the ship’s broken masts. Schools of fish scatter in panic, and the ocean floor is disturbed by swirling sand and debris. Dark, ominous clouds can be seen through the water's surface, casting an eerie gloom over the entire scene