They're almost blind, live in freezing arctic waters, grow to more 6 metres in length and live to 300 years old...
The Greenland shark has been identified as the world longest living vertebrate.
Marine physiologist, Peter Bushnell from Indiana University conducted studies of the sharks to try and identify just how old they were, and says it is now clear they live much longer than any other vertebrate animal.
He's just co-authored a study in the journal science, and talks to Jesse from Indiana.
