Each of the modules has a question as its title which was selected by the readers of the newspaper La Voz de Galicia before the aquarium's inauguration.

Between the interactive modules, the Charca de las caricias (Stroking pool) is where visitors can touch some of the marine life.

There are also modules dedicated to nautical knots, fish smells, parrot songs and the amount of water that can be soaked up by a sponge.

One of the major attractions introduced on May 24, 2006 is Gastón, a 3 m (9.8 ft), 100 kg (220 lb) male sand shark (Carcharias taurus) from the Océanopolis aquarium in Brest, France.

The inside of the Nautilus room pays homage to the 1870 book from which it originated, Twenty Thousand Leagues Under the Seas by Jules Verne.

From here one can access the Paraíso Marino which receives water directly from the sea and inhabited by three male seals: Altair, Gregor and Hansi.