This shark can weigh a ton --- but the record it beats is another!

The Greenland shark may grow to be more than 6 m (19 ft) long and weigh more than a ton but the record it beats is another!

In fact, recent research on the Greenland shark aka grey shark or sleeper shark, in fact, indicates that this colossus of the seas can live up to 400 years, much longer than the giant tortoises! 

By correlating the rate at which Greenland sharks grow which is about 1 cm a year and also dating the radiocarbon levels in their eye lenses it was determined that this particular Greenland shark would be at least 392 years old!