This massive indoor public aquarium contains over 25,000 fish, and was for some time the largest indoor aquarium in the world with 5,000,000 US gallons of water. Shedd Aquarium was the first inland aquarium with a permanent saltwater fish collection. It is surrounded by Museum Campus Chicago, which it shares with the Adler Planetarium and the Field Museum of Natural History.
The aquarium has 2 million annual visitors; it was the most visited aquarium in the U.S. in 2005, and in 2007, it surpassed the Field Museum as the most popular cultural attraction in Chicago. It contains 1500 species including fish, marine mammals, birds, snakes, amphibians, and insects.
Some of the top exhibits are the Beluga Whales, Alaskan Sea Otters, California Sea Lions, the Shark Tank and the Grand Cayman Blue Iguanas.