Self-repairing DNA is the key to their long life...
Bowhead whales are the longest-lived mammals on Earth, with a life span that can exceed 200 years. The research suggests the whales’ ability to repair DNA might be one of the keys to their longevity.
Photo courtesy of: Ansgar Walk, CC BY-SA 3.0 https://commons.wikimedia.org/wiki/File:Gr%C3%B6nlandwal\_3-1999.jpg