Weighing up to 1,000kg (2,200lbs), saltwater crocodiles are the world's largest reptiles, with males often reaching more than 20 feet (6m) in length. With fearsome faces and a reputation to match, they have the biggest ‘bite force’ of any land animal, inhabit both land and water, and can live up to 65 years. They even sleep with one eye open (all the better to size up potential meals). Saltwater crocodiles are responsible for hundreds of attacks worldwide, with fatality rates varying by region. In Indonesia alone, there were 170 attacks in the last decade, of which 85 were fatal.