How is old the oldest frilled shark?

Frilled sharks have never been kept in captivity. In the wild it is hard to know just how long these fish live. Because they are deep benthic creatures there is little information on lifespan. However, one source (Parker and Parker, 1999) estimates maximum lifespan at 25 years. (Parker and Parker, 1999) http://animaldiversity.ummz.umich.edu/site/accounts/information/Chlamydoselachus_anguineus.html they have lived from the prehistoric ages