The Geophagus Balzanii or aka Argentine Humphead, originates from the Paraná River  of the Paraguay drainage area of Brazil and Paraguay. They feed on organic material, small crustaceans and other similar items that they sift from the substrate.

Gymnogeophagus are specialized eartheaters who constantly take in mouthfuls of the substrate and sifting it in search of food.  They can tolerate colder waters down to 60 degrees F.