Unlike other aquariums, the Sydney Aquarium does not provide seals, dolphin performances and other performances, and the aquarium is built on the sea. The aquarium is directly connected to the harbor by pipes. There is little difference between fish living here and in the sea. The aquarium not only presents the marine natural ecology of Australia, but also cooperates with many scientific research institutes such as Sydney University to study marine ecology. Australia is rich in marine ecological resources. More than 13,000 species of submarine organisms from different parts of Australia, including the Great Barrier Reef, the Deep Sea, the Tasmanian Sea, the Rocky Coast, Mangroves and the Sydney Harbor, can be seen here.