A detailed portrait of a menacing creature with its mouth open wide, showcasing sharp fangs, reminiscent of film key art style by Charles Fremont Conner. The artwork features a dark, moody background that highlights the creature's features in profile. The color scheme includes vibrant blue tones, as if illuminated by a dim blue wall, contrasting with the dark setting. The creature is depicted in its full body, poised as if in mid-action, with an atmosphere suggesting an underground sewer. The portrait captures the essence of a suspenseful and thrilling moment, evoking a sense of impending danger.