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.

*National Geographic’s annual Sharkfest makes a triumphant return on July 5, delivering over 25 hours of captivating programming that explores the awe-inspiring world of sharks.

National Geographic's "Sharkfest" returns for its wildest season yet, kicking off with "Sharks Up Close" on July 5 and premiering "Jaws @ 50" July 10!