If you thought that 40 year old sixbar angelfish is old, then let us introduce you to Granddad. Granddad is an Australian Lungfish, Neoceratodus forsteri, living at the Shedd Aquarium in Chicago who is more than 80, eight-zero, years old. Granddad first came to live at the Shedd Aquarium during the 1933 World’s Fair.
Definitely go read the article. Interesting!
Update: here's the original CBS story