New England Aquarium, on the city's waterfront at Central Wharf off Atlantic Ave., is home to more than 40,000 animals representing more than 750 species of fish, invertebrates, mammals, birds, reptiles and amphibians. A 200,000-gallon, circular glass tank with 52 crystal-clear viewing windows rises from the center of the building. Austin Aquarium : SeaToBelieve. More than an Aquarium. An Exciting Adventure! An interactive adventure with. Marine Life, Reptiles, Birds and Mammals... Sunday - Thursday | 10AM - 7PM. Friday - Saturday | 10AM - 8PM. New Year's Day | 11AM - 8PM. ** We will close early at 5.