Croc life span and mortality. In the wild, the salt water crocodile has an average life span of 75 years (a lot longer in captivity) but they don’t typically die of ‘old age’ issues or disease. Mortality in salt water Crocodiles is usually the result of conflict with other crocodiles which can happen at any age. Crocodile skinks are relatively small lizards, growing to a maximum length of around 18 inches. These lizards are oviparous, meaning that they lay eggs. Crocodile skinks typically lay between 2 and 6 eggs at a time. The eggs are incubated for a period of around 2 months before hatching. Crocodiles do not commonly die of old age due to their ‘negligible senescence‘. Negligible Senescence is a term used to denote organisms that do not exhibit evidence of biological ageing. This includes factors such as reductions in reproductive capability, functional declines or rising death rates with age. How old do crocodiles live? Crocodiles live a pretty long time! The average lifespan of crocodiles is about 70 to 100 years. But the oldest living crocodile lived to be 140 years! This crocodile was named Mr. Freshie and he lived in Australia. He was caught by the famous “Crocodile Hunter” Steve Irwin. Of course, that’s not to say that they’ll never die, just that they aren’t about to die from old age any time soon. Here are some animal “facts” that you have all wrong. 2 / 8. The average red-eyed crocodile skink lifespan is roughly 10 years when kept in captivity. Some lucky owners have reportedly seen their lizards live up to 14 years in captivity, but no official reports or studies can confirm this. It’s thought that the red-eyed crocodile skink lives much longer in captivity than in the wild. Crocodiles and alligators die of old age. They get old, lose their teeth, and also become weak. They just happen to have negligible senescence, a process by which their cells deteriorate so slowly. Alligators and crocodiles are not immortal animals. It is also not true that they do not stop growing. They do top growing once they hit a certain VFHJC.