Paraná River Aquarium, Public aquarium in Rosario, Argentina.

The Paraná River Aquarium is a public facility in Rosario dedicated to the river and its inhabitants. The building has indoor and outdoor areas where different tanks recreate the habitats found along the river system.

The aquarium traces its origin to the Acuario y Pabellón de Exhibición built by the Rosario municipality under mayor Agustín Repetto, later transferred in July 1942 to the national Ministry of Agriculture's hydrobiological station. Construction of the new Acuario del Río Paraná began on 29 December 2012 under governor Antonio Bonfatti; the surrounding park opened in May 2015 and the aquarium itself was inaugurated on 9 February 2018. The final cost reached 220 million pesos.

The aquarium's name comes from the Paraná River, whose middle wetlands and delta supply the fish on display. It was promoted by the Santa Fe science secretariat together with the National University of Rosario, the Rosario fly-fishing association ARPEMO and the Rosario aquarists' club CRoA. The bar on the mezzanine has its own entrance and a public terrace, so it can be used outside aquarium hours.

The building is located near the waterfront area and is easily accessible on foot or by public transport. Visitors should wear comfortable shoes as there are multiple levels and outdoor areas to explore.

The cylindrical exhibition tanks are designed to represent different habitats of the Paraná River, showing visitors how conditions vary across different parts of the river system. This design allows aquatic animals to be seen in environments that closely resemble their natural homes.