The Sydney Aquarium is a popular marine attraction located in Darling Harbour, Australia. It features a wide variety of aquatic life, including sharks, rays, and colorful tropical fish. Visitors can explore different themed exhibits that showcase the diverse ecosystems found in Australian waters. One of the main highlights of the aquarium is the underwater tunnel, which allows guests to walk through and observe marine animals swimming overhead. The facility also focuses on education and conservation, offering programs that teach visitors about marine life and the importance of protecting ocean habitats.