Greg Marshall

Fellow (2013-2014)

Picture of Greg Marshall

Photograph by Gerald Kooyman

Picture of Greg Marshall

Photograph by Mark Thiessen

Greg Marshall is an inventor, biologist, conservationist, and Emmy Award-winning filmmaker who has dedicated his life to studying, exploring, and documenting animal life in the oceans and across the globe.

Marshall’s most celebrated contribution to the research community is the invention of the National Geographic Crittercam, a small, lightweight, streamlined camera that has the remarkable ability to travel unobtrusively with its animal hosts where no camera has been before, capturing never before seen footage of the private lives of wild animals.

Marshall’s inspiration for Crittercam came during a diving expedition off Belize during which he encountered a large shark and a remora—a natural hitchhiker fish suckled to the shark’s side. Imagining the unique point of view of this tiny stowaway and the profound information such a perspective would provide for science and conservation, Marshall conceived a remote camera that would mimic the remora’s behavior—and the field of animal-borne imaging research was born. Marshall has since dedicated his life to researching the behavior of marine and terrestrial species across the globe, heading up over a hundred field expeditions worldwide and collaborating in cutting-edge behavioral studies of over 70 species, from lions to emperor penguins to humpback whales.

In addition to publishing with his collaborators in major journals, Marshall has through his Crittercam research provided a dazzling library of imagery from the perspective of animals in the wild. This footage has been used in over 70 National Geographic documentaries, including a 13-part National Geographic television series, numerous PBS/NBC/NGC specials, and 60 short films airing on PBS’s Wild Chronicles series.

Marshall has given hundreds of talks and was one of the founding speakers for National Geographic’s Speakers Bureau. He was recently featured in CNBC’s “10 of the World’s Coolest Jobs.” As Marshall continues to explore new approaches to research and imagemaking, his mission remains to share the experiences of wild animals in ways that make their lives immediate and relatable to humans. Through his research, films, lectures, and conservation efforts, Marshall brings the outdoors inside, creating windows into the natural world that allow animals to show us their world—their struggles, their challenges, and their triumphs.

In the News

In Their Words

When we learn something new and fascinating about animal behavior, the divide between us and them dissipates, and an urgency for conservation is ignited.

—Greg Marshall



  • Crittercam

    Experience the adventure of science through National Geographic's Crittercam.

  • Octopus vs. Sea Lion

    It's a first. Outfitted with a Crittercam, an Australian sea lion has filmed itself hunting, and eating, a large octopus.

  • Image: Two humpback whales

    Humpback Whales

    Watch humpback whales work together to catch their lunches off the coast of Alaska. Get a whale's-eye view with the help of a Crittercam!

  • Tiger Sharks vs. Turtles

    Why does one kind of turtle escape hungry tiger sharks, but another doesn't? National Geographic's Crittercam® helps researchers find out how one turtle species stays off the shark's dinner menu.

Our Explorers in Action

See Photos »

Meet All Our Explorers

  • NationalGeographic_1289095-flag.jpg

    Explorers A-Z

    At the heart of our explorers program is the quest for knowledge through exploration and the people who make it possible.

  • Photo: Michael Lombardi diving

    Explorers by Category

    Browse our different areas of exploration and discover the fascinating people behind the projects.