The family of Pyxicephalidae (African Bullfrogs) has two subfamilies, 13 genera, and 68 total species. They live in Sub-Saharan Africa. The two subfamilies are completely different. Cacosternine frogs are small and slender and live on the ground or in and out of water. Pyxicephaline frogs are large bullfrog-like frogs with thick bodies and fanglike bones on their lower jaws, used to smash their prey.