The Oceanogrāfic of the City of Arts and Sciences is the largest aquarium in Europe and contains representatives of the world’s main marine ecosystems. Each building is identified with the following aquatic environments: the Mediterranean, Wetlands, Temperate and Tropical Seas, Oceans, the Antarctic, the Arctic, Islands, and the Red Sea, as well as the Dolphinarium with 24 million litres of water and a depth of 10.5 metres. The Underwater Restaurant and the Access Building which welcomes visitors stand out because of their spectacular roofs designed by Félix Candela.During their route through the various installations, visitors can get to know at first hand the behaviour and way of life of over 45,000 individuals of 500 different species: dolphins, belugas, walruses, sea lions, seals, penguins, turtles, sharks, rays, sawfish, jellyfish, starfish, sea urchins, and crustaceans of all kind..., as well as wetland bird species such as those inhabiting the Albufera de Valencia and tropical mangrove swamps.