The GloFish® Color-Changing Octopus Ornament is the perfect finishing touch for any GloFish aquarium. Use this ornament to transform your tank into a GloFish aquarium! This classic underwater addition brings more vivid color to the GloFish environment. Utilize GloFish black light LEDs to watch the colors change, or see them fluoresce under blue LEDs! Observe the black light effect in a dark room for full brilliance!.