Topics: 400-year-old Greenland shark ‘longest-living. - BBC News

Researchers used radiocarbon dating to determine the ages of 28 of the animals, and estimated that one female was about 400 years old.

Lead author Julius Nielsen, a marine biologist from the University of Copenhagen , said: "We had our expectations that we were dealing with an unusual animal, but I think everyone doing this research was very surprised to learn the sharks were as old as they were."

But if invertebrates are brought into the longevity competition, a 507-year-old clam called Ming holds the title of most aged animal.