In December 1991, the first Seal Sanctuary was opened. Since then, Sydney Aquarium has upgraded the facilities and a new oceanarium to house seals opened in September 2003. The Seal Sanctuary features Australian sea lions, Australian fur seals, subantarctic fur seals, and New Zealand fur seals. In this floating oceanarium, the seals can be seen below the water's surface from underwater viewing tunnels, and from above on an open-air deck. The Seal Sanctuary is incorporated into the Southern Oceans exhibit, which also features little penguins, the Open Ocean Oceanarium, and Sydney Harbour displays.