Blue Planet II - Series 1: 4. Big Blue

Name: Blue Planet II - Series 1: 4. Big Blue
Description: The wildlife documentary series narrated by David Attenborough explores a vast ocean desert where sperm whales must dive 1,000 metres just to feed.

The wildlife documentary series narrated by David Attenborough explores a vast ocean desert where sperm whales must dive 1,000 metres just to feed.