TOOGOO(R) Orange Glowing Effect Artificial Fake Jellyfish for Fish Tank Decor Ornament This brand new and high quality artificial jellyfish is ideal decoration for the fish, tank and aquarium. It is incredibly detailed imitation of floating jellyfish. Its glowing effect (actinic lighting) is triggered by enviroment lights (won't happen in darkness) to add some unique atmosphere. It moves by water current inside the tank. It is harmless to all fish.