Penn Plax Action Air Shipwreck Aquarium OrnamentThe Penn Plax Action Aerating Split Shipwreck boat ornament comes to life and moves as bubbles rise. You also have a wide range of choices in setting up the Shipwreck in your aquarium. Halves may be separated, placed over rocks, or set at angles to each other. Bring your aquarium to life with a Action Air Shipwreck Shipwreck requires air pump and airline tubing to activate movement Colorful hand painted shipwreck gives each ornament its own individual