Lisli 5x Glowing Effect Artificial Fake Jellyfish for Fish Tank Decoration Ornament Package included: 5pcs x Artificial Jellyfish Ornament Material: silicone. Color:Mixed Colours,Sent by randomly Note;This item needs to absorb light to glow in the dark, so please light the artificial jellyfish with lamp first. The glowing effect will be better if it is lighted with blue or purple color lamps. Size: diameter 5CM Length 18CM We are trademark of "Lisli" Pls do not believe other similar items,Thanks.