Saltwater crocodiles hunt a large variety of prey such as crustaceans and vertebrates including turtles, goannas, snakes, shore and wading birds, buffalo, domestic livestock, and wild boar. Juveniles are restricted to smaller prey such as insects, amphibians, crustaceans, small reptiles and fish. They are fed chickens and rodents twice a week. Eventually fish will be added to their diet. They can live up to 70 years of age.
Saltwater crocodiles are the largest living reptile.
Adult males can reach sizes of up to 6 or 7 metres in length, but the average male is usually smaller - up to 5 m in length. Females don't normally grow larger than 3 m. The wild ones are usually dark in colour, with areas of tan or grey. Their bellies are creamy yellow to white with the underside of their tail being grey. Females will lay 40 to 60 eggs in mound nests made from plant matter and mud.