Create a mesmerizing digital illustration capturing the mysterious beauty of the deep sea. Start with a dark, underwater landscape, emphasizing the depths and vastness of the ocean. Introduce ethereal jellyfish floating gracefully, their translucent bodies glowing with bioluminescent light that illuminates the surrounding water.
Use a color palette of deep blues and greens to convey the ocean's depth, with hints of bioluminescent hues like soft greens, blues, and purples for the jellyfish. Add subtle glimmers and reflections to mimic the play of light underwater, creating a sense of movement and life in the scene.
Focus on the contrast between the dark, serene depths and the gentle, otherworldly glow of the jellyfish to evoke a sense of wonder and tranquility. Incorporate intricate details in the jellyfish tentacles and the surrounding marine life to enhance the realism and depth of the illustration, making it a captivating piece of digital art.