The Nile crocodile (Crocodylus niloticus) is an African crocodile, the largest freshwater predator in Africa, and the second-largest extant reptile and crocodilian in the world, after the saltwater crocodile (Crocodylus porosus), measuring 4 to 6 meters in length.
The Nile crocodile is quite widespread throughout sub-Saharan Africa, occurring mostly in the central, eastern, and southern regions of the continent, and lives in different types of aquatic environments such as lakes, rivers, and marshlands. Although capable of living in saline environments, this species is rarely found in saltwater, but occasionally inhabits deltas and brackish lakes.
Sexual dimorphism is prevalent, and females are usually about 30% smaller than males. They have thick, scaly, heavily armored skin.