The Uniclife Aquarium Imitative Iridescent Blue Sea Urchin Ball Artificial Silicone Ornament with Glowing Effect for Fish Tank Landscape Decoration is a charming addition to any fish tank. This ornament imitates the real sea urchin, and its blue color makes it stand out among all the other decorations in the tank. It also glows under actinic lighting, so you’ll have a beautiful display at night. The durable material is easy to clean and maintain, and it’s easy to use.