Jellyfish Rentals: Our jellyfish can beautifully accent your under sea decor for weddings, proms or themed parties. Delightful and fun. Our rental jellyfish are lightweight, compact, easy to set up and can be brought to life with a simple arm movement. We offer affordable rental packages with either 5 or 10 jellyfish that stay brightly lit for up to 5 hours per battery charge. Use the jellyfish as stand-alone accent lighting.