A stunning, hyperrealistic underwater scene showcasing a three-layered cake, each tier depicting a different oceanic environment, crowned with a meticulously detailed black pirate ship navigating through swirling mists. Below, a fearsome Kraken emerges with tentacles wrapping around the cake base, amidst an intricately designed and vividly colored universe diorama that captures the mysteries of the deep. The piece is brought to life with dramatic, immersive lighting that highlights the fine details and textures, employing advanced rendering techniques for a photorealistic effect, enhanced by an exquisite depth of field. Imagine the scene crafted with the power of an unreal engine, rendered in striking 8k resolution with an artful twist on the 9:16 aspect ratio.