This majestic sea monster looms ominously in the depths of an inky ocean. Its large and powerful frame is mostly blue-green in color with a slimy, snake-like body that stretches off into the depths. The creature’s fearsome array of tentacles and razor-sharp teeth loom menacingly, while its bulging eyes seem to watch everything with a calculating intensity. Smaller fish scurry away in panic as it emerges from the depths. To color this frightening creature, you could use deep hues of blue and green, contrasted by deeper blacks, purples, and blues inside its menacing maw and eyes. You can add subtle touches of yellow to the edges of its tentacles to give it an otherworldly, eerie glow. Be sure to shade the sea monster's body and accessorize with details like bubbles and tiny fish. With these additions, you’ll have created a creature that is truly frightening and yet also incredibly alluring.