A charismatic anthropomorphic jellyfish pirate, standing confidently with a billowing underwater backdrop, intricate tentacles flowing like a royal cloak, bioluminescent patterns glistening on their translucent body; adorned in a hybrid of typical pirate garb and oceanic elements, their hat resembles a sea anemone, and their sash is woven from vibrant seaweed. The jellyfish pirate is dramatically backlit by soft, shimmering light rays that pierce the water, casting mesmerizing patterns on their form, creating a dynamic play of colors and shadows. Their eyes twinkle with a sense of adventure and cunning, as they grip a coral-encrusted cutlass. In the background, hints of a sunken ship and treasure chests subtly blend with the swirling currents, lending an atmosphere of enigma and exploration to the scene, all rendered in highly detailed imagery that could be trending on Artstation.