Greenland Sharks May Live 400 Years

Greenland sharks are slow. Researchers suspected that Greenland sharks' exceptionally slow growth meant that they lived a long time, but they had no idea just how long that might be. A new study provides the first estimates for Greenland shark longevity, and shows that these slowpokes of the sea stick around a very long time — at least 272 years, and perhaps as long as 390 years on average, making them longer-lived than any other vertebrate in the world.