The Oceanographic is the largest complex of its type in Europe, spanning 110,000 square metres (1,200,000 sq ft) and holding a capacity of 42,000,000 litres (11,000,000 US gal) of water,[1] including a 26,000,000-litre (6,900,000 US gal) dolphinarium and a 7,000,000-litre (1,800,000 US gal) ocean tank with sharks, rays and other fish.[1] It is home to 45,000 animals from 500 different species—including sharks, penguins, dolphins, sea lions, walruses, beluga whales, birds, reptiles and invertebrate—all inhabiting nine two-tiered underwater towers representing the Earth's major ecosystems. The aquariums utilize sea water pumped from the La Malva-Rosa beach.