What is the longest living pet you have owned?

Recently I met a man who has a 50 year old tortoise. He'd had it ever since he was a young boy. I was also introduced to a very ancient cat, she was around 20 years old, and I have heard of a horse in its thirties.

I think tortoises and parrots are probably the longest living pets. It must be wonderful to have the same companion pet for half a century or more.

Have you or your family been lucky enough to have a pet that has lived for several decades?