Get ready for a fin-tastic summer! National Geographic's "Sharkfest" is back for a new season of jaw-dropping fun. From "Sharks Up Close with Bertie Gregory," to "Jaws @ 50: The Definitive Inside ...

In an unprecedented effort, 15 aquariums from around the world are teaming up to raise endangered baby zebra sharks and reintroduce them into the wild, where populations have nearly gone extinct.

NARRATOR: In February 2017, he was flying his drone during a shark survey when the phone rang.RYAN: The phone call came infrom the National Sea Rescue Institutethat they had been alerted that there ...