Saim Baby Dinosaur Hatching out Aquarium Ornament Fish Tank Decoration Real motion air-driven ornament provides entertaining action while aerating your tank Air activated moving bubbler to decorate your aquarium Put the ornament in an unobstructed place in your aquarium Completely cover the ornament's base with gravel Note: The airline tubing is not included, and due to the item is lightweight and it will float when you put it into tank, so you need to press it by rock or earthbag