The Weewooday 6 Pieces Glowing Aquarium Ornaments Silicone Fish Tank Decor Artificial Sea Anemones Decorations are perfect for any fish tank. These ornaments are made of soft silicone and plastic emulsion material that is safe for use in freshwater and saltwater environments. With a wide range of colors available, you can find the perfect shade to complement your fish tank. The ornaments are easy to install and come with a detailed instruction sheet.