A superhero great white shark clad in intricately ornate armor stands heroically in the stunning underwater city of Atlantis. The scene is reminiscent of a cinematic movie poster, with vibrant anime and manga graphics. Swirling schools of fish weave through the water in the background, illuminated by the soft, golden hues of dawn. The atmosphere is one of triumphant exuberance, enhanced by the brilliant colors and high detail of offset printing. The poster is rendered in 8K HD quality with a CMYK color scheme, showcasing dramatic cinematic lighting. This vibrant depiction captures a sense of joy and adventure, within a tall 9:16 aspect ratio composition.