These frogs are also called PacMan Frogs. The scientific name is Ceratophrys ornata. They originated in Argentina, Uruguay and southeastern Brazil.
Males have dark looser throats and nuptial pads on the inner thumbs.
They can be aggressive and bite and should be kept separately. In this environment, they are very hardy. Feed small frogs small guppy sized fish or small crickets and adults with larger fish and crickets. Feed small frogs every two days, eventually, feeding adults once a week to ten days. Do not overfeed and teach to eat from tongs to prevent consumption of gravel.