National Geographic's upcoming docuseries, 'Secrets of the Penguins,' captured a shocking encounter between a mother rockhopper penguin and giant, hungry sea lion, and PEOPLE has a first look at ...

"This mother is a fighter," Lively says in the clip as the penguin turns around and faces the towering sea lion, who is "70 times her size." What comes next is a "never filmed before" interaction ...

In a video clip of Secrets of the Penguins, exclusively shared with PEOPLE, a mother penguin stares down a sea lion more than 70 times her size — and wins.

The clip of the rockhopper mom facing off with a giant sea lion comes from National Geographic's upcoming docuseries, 'Secrets of the Penguins' ...

In a video clip of Secrets of the Penguins, exclusively shared with PEOPLE, a mother penguin stares down a sea lion more than 70 times her size — and wins. In the video, ...