Dimart Fluorescent Emulational Silicone Octopus Aquarium Decoration With Sucker Cup Green&Pink Material: Made of high quality silica gel, durable and nontoxic, which is safe for your aquarium. High emulational octopus, bring more natural feeling to your tank. With sucker cup, making it fixed in your tank. A good new friend for your pets. And it also can provide places for nitrifying bacteria. In the lamplight, it will have the effect of fluorescent light, help to build a ideal sea world for you.