Viskey Small Size Luminous Artificial Jellyfish for Aquarium Fish Tank Ornament,Green Viskey Small Size Luminous Artificial Jellyfish for Aquarium Fish Tank Ornament,Green. Material: environmental silicone. Size: diameter 1.97"* H 7.09". Harmless to all aquatic life in the fish tank. Attaches by thin invisible line between the sucker and jellyfish. Package includes 1 pcs artificial jellyfish.