The Shedd Aquarium opened on May 30, 1930, and is home to 1,500 species, including fish, marine mammals, birds, snakes, amphibians, and insects. With more than 5 million gallons of water, it was at one time the largest indoor aquarium in the world. Located along the shore of Lake Michigan, Shedd Aquarium was the first inland aquarium with a permanent saltwater fish collection. The aquarium is formally named the John G. Shedd Aquarium.