As their ice world disappears, polar bears have been known to swim up to 60 miles offshore in search of food.
Narwhals are some of the most mysterious and elusive animals in the oceans.
These inquisitive walruses were eager for some camera time!
Discover how the ‘Blue Planet 2’ crew filmed a mother walrus and her pup using the UHD Mega-dome.
Over four years of filming, the ‘Blue Planet II’ crew witnessed key changes in the world’s oceans.