To be clear is it an dwarf african frog(Hymenochirus boettgeri) or the african clawed frog(Xenopus laevis)? If it's the first one then you could put small fish like guppies but nothing to big or boistrous. If it's the second then nothing because 10 gallons is too small to keep fish big enough to be housed with them. Anything else would be eaten. But if you're interested mild fish like oscars, severums, large, angels, pictus cats, festivums, kissing gouramis, opaline gouramis, and the list goes on. Basically anythign to big to be eatin.