The Oceanarium (Oceanário de Lisboa) is an oceanarium in Lisbon, Portugal. It is located in the Parque das Nações, which was the exhibition grounds for the Expo '98.
The Lisbon Oceanarium has a large collection of marine species — birds, mammals, fish, cnidaria, and other marine organisms totaling about 16,000 individuals of 450 species.
The main exhibit is a tank with four large acrylic windows on its sides, and smaller focus windows strategically located around it to make sure it is a constant component throughout the exhibit space. About 100 species from around the world are kept in this tank, including sharks, rays, chimaeras, various species of tuna, barracudas, groupers, and moray eels.
Four tanks around the large central tank house four different habitats with their native flora and fauna: the North Atlantic rocky coast, the Antarctic coastal line, the Temperate Pacific kelp forests, and the Tropical Indian coral reefs.