The Lisbon Oceanarium is one of the few aquariums in the world to house a sunfish, because of their unique and demanding requirements for care. Throughout the first floor there are an additional 25 thematic aquariums with each of the habitats' own characteristics. These tanks are separated from the central tank only by large sheets of acrylic to provide the illusion of a single large tank. įour 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. One of the main attractions is a large sunfish. About 100 species from around the world are kept in this tank, including sharks, rays, barracudas, groupers, and moray eels. It is 7 m (23 ft) deep, which allows pelagic swimmers to swim above the bottom dwellers, and provides the illusion of the open ocean. The main exhibit is a 1,000 m 2 (11,000 sq ft), 5,000,000 L (1,300,000 US gal) tank with four large 49 m 2 (530 sq ft) 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. The Lisbon Oceanarium has a large collection of marine species - penguins, seagulls and other birds sea otters (mammals) sharks, rays, chimaeras, seahorses and other bony fish crustaceans starfish, sea urchins and other echinoderms sea anemones, corals and other cnidaria octopuses, cuttlefish, sea snails and other mollusks amphibians jellyfish marine plants and terrestrial plants and other marine organisms totaling about 16,000 individuals of 450 species.
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