Thousands of representatives of ocean, sea, river and lake fauna live in several aquariums, the total volume of which is 7 million liters. The public is especially delighted by the large panoramic aquarium, which allows one to see the underwater world in the smallest details. The National Aquarium of Denmark also has a popular attraction these days - an underwater tunnel, thanks to which one can take a walk along the seabed with sharks without getting wet or eaten.