An imaginative and whimsical character portrait of an anthropomorphic jellyfish pirate, capturing the essence of the sea-faring life, with translucent tendrils flowing like wild hair. The scene is dramatically backlit, casting light rays that shimmer through the jellyfish's body, enhancing the texture and detail. A complex array of vibrant colors brings each gelatinous surface to life, creating a cartoonish yet intricate design. The pirate's costume is adorned with sea-themed accessories, including barnacle-encrusted trinkets and a shell-embellished tricorne hat. Multiple expressive faces are subtly blended into its form, adding an air of delightful confusion and maritime mystique. The illustration is rendered in high-definition vector art, appearing as though it's part of a trending gallery on art platforms, with a touch of distortion to play with the perception of this oceanic marauder.