A stunningly detailed three-tiered underwater cake features a sleek black pirate ship sailing majestically on the top layer. Below, the depths reveal the monstrous Kraken coiling around the cake, its limbs exquisitely sculpted with intricate texture. The universe diorama backdrop adds a cosmic wonder with shimmering celestial bodies, casting dramatic lighting that enhances the hyperrealism. The scene is captured with photorealistic precision, leveraging advanced rendering techniques to simulate depth of field and texture richness. This breathtaking masterpiece is rendered in unreal engine and presented in dazzling 8k resolution, maintaining a 9:16 aspect ratio.