Measuring the Greenland shark’s growth rate is challenging because individuals are rarely recaptured. However, one shark tagged in 1936 had only grown 2.3 inches when it reappeared 16 years later.

"My best guess would be that the deep waters of the Arctic can be a challenging environment to live in, where an animal such as the Greenland shark may not have consistent access to plenty of food ...

Ju Shardlow: Look up the list of the most misunderstood foods in the world, and fermented shark is probably on it. But here in the west of Iceland, it is a regional delicacy. It's Greenland shark ...

The Greenland shark lives in one of the most extreme environments ... and its slow way of life means it expends little energy when scavenging for food - perhaps a drowned Polar bear or dead ...