Photo credits: The Barcelona Aquarium.

The Barcelona Aquarium, also known as L’Aquarium de Barcelona, is one of the largest aquariums in Europe and is located in the Port Vell area of Barcelona, Spain. The aquarium was opened in 1995 and is situated in a unique building designed by the famous Catalan architect, Gae Aulenti.

The aquarium houses more than 11,000 animals of over 450 species in different zones, which includes the Mediterranean, the tropical seas, and the deep ocean. The most popular attraction of the aquarium is the Oceanarium, which is the largest aquarium in Europe, featuring a transparent tunnel, allowing visitors to walk through the exhibit as sharks, rays, and other large fish swim around them.

Apart from the Oceanarium, visitors can also see exhibits showcasing the different marine ecosystems, such as coral reefs, mangrove forests, and seagrass meadows. The aquarium also offers interactive experiences such as the "touch pools" where visitors can touch sea creatures like starfish and sea urchins.

The aquarium also has a conservation program, which focuses on marine species, their habitats, and the conservation of the oceans. The program includes research and education initiatives, such as the development of sustainable fishing practices, marine biodiversity studies, and awareness-raising campaigns on the importance of ocean conservation.