YueYueZou&reg; Big Size Aquarium Jellyfish Fluorescent Aquarium Decor 4*8 Inches Pack of 3 Diameter: Approx. 10cm / 4",Full Length: Approx. 14cm / 5.5" Harmless to all fish Color: Blue, Yellow, Purple. Material: soft silicone and fluorescent powder Fits both salt water and fresh water Incredibly detailed imitation floating jellyfish