Located on Main Street in Riverhead, along the Peconic River, Long Island Aquarium (formerly Atlantis Marine World) is Long Island’s full-scale Aquarium.
Themed around the “Lost City of Atlantis,” Long Island Aquarium blends science and nature with myth to create an informative and entertaining environment for visitors of all ages. We offer a rich variety of experiences, from fascinating marine life exhibits to Aquatic Adventures and educational programs.