Aquarium Barcelona (Catalan: Aquàrium de Barcelona, IPA: [əˈkwaɾium də βərsəˈɫonə]) is an aquarium located in Port Vell, a harbor in Barcelona, Catalonia, Spain.

The 35 aquariums at the facility are home to 11,000 animals representing 450 species, and an 80-meter (260 ft) underwater tunnel.