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.

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 ...