African Clawed Frog
African clawed frogs are native to eastern and southern Africa. They have been introduced in North America, much of Europe, South America, and are now well established on these continents.
African clawed frogs do very well in a 10 or 20 gallon aquarium. Fresh spring water or dechlorinated tap water (not distilled water) is recommended. The water should be filtered. Although not as visually pleasing, a bare cage bottom works well when keeping these animals. If gravel is used, make sure it is too large for the frogs to ingest during feeding.
Feeding African clawed frogs is rarely problematic. Tropical fish food, small crickets, earthworms and small guppies make an adequate diet. Any uneaten food should be removed from the cage to maintain the water quality.
On a side note, African clawed frogs are regulated in several states and may be illegal to possess. Always check state regulations to ensure you can legally keep one of these amphibians.