Glowing blue jelly Fish. Approximately 5cm in width. Beautiful and life-like artificial jellyfish to decorate your fish tank. It has glowing effect, It will look more beautiful in the dark. This jellyfish is great ornament for your aquarium. 100% Brand new and high quality. Incredibly detailed imitation floating jellyfish. Glowing effect under actinic lighting. Moves by Water Current in tank. attaches by thin invisible line and suction cup. Harmless to All Fish. made up of silicone and fluorescent powder.