The pearl cichlid (Geophagus brasiliensis) is a species of fish in the cichlid family. It is native to southeastern Brazil and Uruguay, where it is found in rivers, lakes, and nearby slightly brackish lagoons. It has been introduced to several countries far from its native range, including the United States, Australia, the Philippines, and ******. In Australia, it has been released into the Tweed River system, New South Wales, and the Swan River system, Western Australia, where it inhabits fresh and brackish water at a wide range of pHs.