Zaragoza Aquarium is the biggest river water acuarium in Europe and the third biggest in the world. Over 5000 specimens of over 300 characteristic species of different rivers of the world, distributed over 60 fish tanks and terrariums. The Acuarium gathers the planet´s biodiversity promoting its origin, evolution, adaptation and influence. Its aim is to educate, promote and investigate through a tour around the 5 great rivers of the world: Nilo, Amazonas, Mekong, Murray-Darling and Ebro.