The Civic Marine Aquarium of Trieste was inaugurated in 1933 on the premises of one side of the building that then housed the city’s Central Fish Market. The building, which overlooks the sea, was erected in 1913 to a design by the architect Giorgio Polli and currently houses the “Salone degli Incanti”, a space dedicated to exhibitions and cultural meetings. The marine aquarium occupies the ground floor and the first floor of the part that includes the clock tower on which a bell tower stands.
In reality, the bell tower contains a tank of water taken directly from the sea and which, through a powerful pumping system, is pushed into the tower at a height of about 10 meters. When the large settling tank is filled, the water, by gravity, is delivered to the ground floor where there are about thirty tanks. The advantage of this system consists in the continuous replacement of the water while leaving its plankton content intact.