LESYPET 5pcs Glowing Artificial Jellyfish Ornament For Aquarium Fish Tank DEAL DECORATION: Floating freely and graceful incredibly detailed imitation floating jellyfish. HARMLESS TO YOUR FISH: Made of Eco-friendly silicone material, nontoxic, odorless and durable. It can be used in the fish tank for a long term and the height can be adjusted freely.Floating freely and graceful, an ideal decoration for the fish tank and aquarium. The fixed line and suction cups are separated,you need to make a knot before using. Please note: This simulate jellyfish is not a luminous type,it can't be self-luminous in dark environment.It needs to cooperate with the aquarium light.These pictures are taken under the irradiation of blue & white lights, we recommend blue & white light, blue light or purple light to get better effect.