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[[File:Goldfish in Fish Swimming Amid Falling Flowers by Liu Cai (cropped).jpg|thumbnail|left|600px350px|Figure 1. Goldfish being kept in a pond. Goldfish were the first type of fish purposely raised as pets. ]]
Large public aquariums have become fixtures in most major urban regions. In some places, they have become among the leading attractions for city tourism, where many aquariums have also expanded into conservation efforts and applied research along with being tourist destinations. The history of such aquariums is not completely modern, although the form in which we know aquariums today is mostly a recent development.