The artificial jellyfish are made of silicone, so they don't need to be fed or have their water changed. Also included are artificial aquatic plants and raw labradorite stones. With a fish tank and aquarium illumination, the artificial jellyfish, the tank, and the raw labradorite stones (heart-shaped ones are rare) will glow, creating a vibrant aquarium. The artificial jellyfish have transparent threads attached, so you can attach them to the aquatic plants, and they will float in the water. It's beautiful and relaxing. #aquarium #jellyfish #labradoritestone