There are a number of aquatic frogs that are available in many pet stores. Some of them are listed as African Clawed Frogs (Xenopus laevis) and sold as a different type of animal for the home aquarium. But the question really is answered by this very complete website devoted to the :
My African clawed frog is swollen - PLEASE HELP!!! - Aquarium Forum
Problems concerning damage to internal organs may be related to the fact that people often keep African clawed frogs in aquariums with tropical fish (many pet stores advise this), and like most frogs, they will try to swallow whatever they can catch. Many fish slow down at night, and become easy targets for the frogs – damage from dorsal and other fin spines, especially from catfish and some cichlids, is quite common in these situations.
African Clawed Frog Housing and Feeding
Thanks for your question concerning African clawed frogs. They are, as you say, fascinating to watch, and they make great pets. You should be able to train yours to accept food from your hand, and the frog may even swim to the surface in anticipation of a meal when you open the aquarium’s lid.
Can I keep other aquatic life with my ACF?
Tank Requirements: African clawed frogs are pretty hardy pets as long as their basic care needs are met. At least 10 gallons of water, and more if possible, per frog is recommended. Because these frogs are fully aquatic, caring for them is very similar to caring for fish. They do not require any land, however they do breathe air so must be able to easily access the top of the water. Long aquariums are usually recommended over taller ones, because clawed frogs usually spend a majority of their time down near the floor of the tank.The African Clawed Frog is a Fairly large frog species, males ranging from 2-3 inches long, and females about 4-5 inches or larger. With proper care these frogs can live up to 15-20 years or more! These frogs are entirely aquatic, never leaving the water. It is because of this reason they have grown in popularity in the aquarium hobby, but these frogs eat anything they can fit in their mouths, sometimes things that can't! They Originate from Africa, and are native to wetlands, lakes, and ponds, typically fish free. Due to imports from the 1950's and onwards, color morphs have started to appear, such as albino, Golden albino, and Reticulated albino have appeared in the pet trade.(Also worth noting that people have injected these frogs with dyes and pigment, calling them neon or jelly bean frogs to make more money and flim-flam other people into thinking they have a rare species) They are members of the Xenopus family, and have special adaptations that identify them as Xenopus. Their front feet have "fingers" that they use instead of a tongue to nab their prey. (Again worth noting, these frogs don't have tongues or vocal sacks, the "bubble" that lets male frogs call, instead they use vocal cords to make this call ) They also have claws on their rear feet, hence the name. This care sheet is intended for anyone who wants to own this species, or already does, and wants to re-read information they already heard.