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Aquarium

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A glass-sided container in which water-dwelling plants and animals (usually fish) are kept in captivity.


The keeping of fish in an aquarium became a popular hobby during the twentieth century, with many species of fish being caught and transported from the tropics before it was discovered how to breed them. Freshwater aquaria remain the most popular form, but marine (saltwater) aquaria have gained cachet as the true enthusiast's preserve.


Aquaria can vary in size from a small bowl just large enough for a single goldfish to the huge public aquaria in cities such as Cape Town and Monterey, which can simulate entire marine ecosystems.