Penn Plax Shipwreck Aquarium Decoration Ornament with Moving Masts, Lifeboat, and Bubble Action Aquarium ornament has live action with moving masts that sway, lifeboat that moves, and bubbles that rise from the holes in the ship. Ship attaches to air pump enabling movement providing both visual appeal as well as aerating your tank in a unique, fun way. Air pump, tubing and gang valve not included. Large shipwrecked boat comes in two large pieces that measure 9.5 inches across by 4.7 inches high. Masts can be raised to over 7 inches if desired. Made of safe durable resin, this fish tank ornament is hand painted with detail and is safe for use in both freshwater and saltwater aquariums.