This is part of the epic six-part underwater discovery series OCEANXPLORERS, co-produced by BBC Studios Natural History Unit and OceanX for National Geographic.

Ice Giants (41min)

The team brings the OceanXplorer as far north as possible, to the edge of the Arctic ice cap. There, they learn how a population of bowhead whales, once hunted almost to extinction, is faring today. They are also the first to observe the feeding strategies of the deep-sea Greenland shark, an animal that can live for more than 400 years.

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Melissa Marquez is in the Hololab to analyse the Greenland shark’s anatomy. (National Geographic)