Because olms live in such secluded environments, little is known about their lifespan or longevity in the wild. In fact, much of the information available concerning Proteus anguinus has been gathered from observing populations in captivity. The average age of an individual in captivity was 68.5 years, and the expected life expectancy is over 100 years.
Status: wild: 100+ (high) years.
Status: wild: 68.5 years.
Status: captivity: 68.5 years.