detailed image of a nightmarish, multi-tentacled sea monster emerging from a stormy, rocky shoreline. The creature should have a grotesque, alien appearance with a mix of green and red hues on its segmented body, covered in armor-like scales and protruding spikes. Its numerous tentacles writhe menacingly, some ending in snake-like heads. The scene is set against a dark, stormy background with crashing waves and jagged rocks. Lightning strikes illuminate the chaotic scene, highlighting the monster's terrifying features. The artistic style should be highly detailed and dramatic, emphasizing the creature's otherworldly and horrifying nature