Perfect shopping Multi Colors Glowing Effect Artificial Silicone Fish Tank Aquarium Decorations (2PCS) This artificial jellyfish can float in the water and move by the flowing water. It is designed for decorating the fish tank or aquarium. It attaches by invisible line and suction cup and you can change the location optionally. Material is no harm to fish and other animals. Diameter : Approx. 5cm;Length : Approx 15cm