Decoration for fish tank: floating flexibly and graceful incredibly detailed imitation floating jellyfish, one package includes 12 pieces; Color: red, yellow, green, blue, orange, purple Harmless to fish: non-toxic silicone material is harmless to your fish, it can be applied in the fish tank for a long term and the height can be adjusted, floating flexibly and graceful, an ideal decoration for the fish tank and aquarium Glow in the dark: just fix suction cup, it attaches by thin invisible line, the glowing effect will only happen under actinic lighting, blue or purple light is recommended Bright colors: the size is approx. 15 x 5 cm / 5.9 x 1.9 inch, they glow under blue light and purple light beautifully, no surprises if your friends will later think they have just seen a real jellyfish, you can also put this fish aquarium decor along with coral reef decorations Make your fish tank lovely: the glowing aquarium decorations are the standard through which artificial tank decorations