Xenopus (/ˈzɛnɵpəs/) (Gk., ξενος, xenos=strange, πους, pous=foot, commonly known as the clawed frog) is a genus of highly aquatic frogs native to sub-Saharan Africa. Twenty species are in the Xenopus genus. The best-known species belonging to this genus is Xenopus laevis, which is commonly studied as a model organism for developmental biology, cell biology, toxicology, and neuroscience.