This goldfish is an ornament from Aqua Della's Action Air series. These cartoonish fish come with a tube for connection to an air pump. This pump increases the water's oxygen level and produces bubbles, creating the illusion that the fish are blowing them. These themed ornaments are standardized to accurately reproduce this theme. This ornament is made of polyester resin. It is completely harmless and has no impact on the biological balance of your aquarium. The decoration is suitable for both freshwater and saltwater aquariums. Care instructions: Carefully remove the decoration from the box and rinse it with lukewarm water. Caution: Do not use soap, all-purpose cleaners, or other cleaning products (e.g., hydrogen peroxide, thinner, turpentine).