The Lpraer 6 Pack Glow Jellyfish Floating Fish Tank Decorations Glowing Effect Silicone Simulation Jellyfish Ornament Aquarium Decorations (6 Colors) is a unique and stylish way to add some life to your aquarium. These glow jellyfish are made of non-toxic silicone, so they’re safe to use in any aquarium. With six different colors to choose from, you can find the perfect match for your aquarium or fish tank.