A remarkable creature lives beneath the ice floes of the Arctic. Greenland sharks swim excruciatingly slowly, have been known to eat polar bears and live for an implausibly long time. Peter is bringing their mysteries to the surface.
A Greenland shark female 2.9 m in length tagged with three PSATs. As these sharks mostly occupy waters where no light is available, measurements of light intensity at a certain depth at a certain time cannot be used to estimate the geo-location (as it for example can with tunas). To get more information on Greenland shark migration routes three tags were mounted on the sharks which will then release after various time periods. Photo by Julius Nielsen
Old and Cold - Conservation of Greenland Sharks