Create a realistic digital rendering of a tranquil underwater scene featuring glowing jellyfish drifting gracefully in deep blue water. The image should be vertical to capture the height of the jellyfish and the rising bubbles around them. Use a mid-range aperture of f/5.6 for balanced focus, paired with a high ISO setting (800-1600) to effectively capture the soft light filtering from above. The lighting should be soft and diffused, with cool blue color tones creating an ethereal atmosphere. Position the glowing jellyfish in the foreground, emphasizing their delicate tentacles and bioluminescent effect against a softly blurred blue gradient background. In post-production, apply a soft glow around the jellyfish and a light bloom effect on their edges, ensuring smooth color transitions throughout the image. Keywords: underwater scene, jellyfish glow, ethereal ocean, soft light