This Small Island Nation Makes a Big Case For Protecting Our Oceans loading...
This Small Island Nation Makes a Big Case For Protecting Our Oceans
Two years ago, Palau created one of the largest marine reserves on the planet—and it's paying off.
Enormous Fish Make One of the World’s Largest Migrations loading...
Enormous Fish Make One of the World’s Largest Migrations
Billions of fish make an annual trek through the rivers of Southeast Asia, supporting millions of people. Yet scientists still don’t know much about them.
Can the Amazon of Southeast Asia Be Saved? loading...
Can the Amazon of Southeast Asia Be Saved?
The Mekong River Basin supports millions of people and some of the world’s richest biodiversity, but it must overcome many threats.
One of the World's Weirdest Fish loading...
One of the World's Weirdest Fish
What in the world is a hagfish?
See Award-Winning Underwater Photos From Around the World loading...
See Award-Winning Underwater Photos From Around the World
These 13 photos were among those recognized by the Underwater Photographer of the Year contest, which showcases the best in underwater photography.
About the Show
National Geographic Explorer and aquatic biologist Zeb Hogan is on another adventure, searching for everything from the mythical giant catfish to the king of the Alaskan rivers, the Chinook salmon

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