Man in kerchief in the water up to his shoulders.

He’s called ‘omacha,’ a dolphin that transforms into a man. Why?

Fernando Trujillo, the 2024 Rolex National Geographic Explorer of the Year, has devoted his life to protecting the Amazon’s river dolphins.

Fernando Trujillo, shown in the Amazon River, has made conservation of river dolphins—depicted on his kerchief—his life's work.
Photograph by Jorge Panchoaga
ByRachel Hartigan
May 13, 2024

Colombian marine biologist Fernando Trujillo has been named the 2024 Rolex National Geographic Explorer of the Year. This award is given by the National Geographic Society to an intrepid Explorer who highlights vital issues facing our planet and inspires others to act. “His work in South America enhances protections for endangered wildlife and supports sustainable practices for the betterment of local communities,” says Jill Tiefenthaler, CEO of the Society.

(Understanding the Amazon’s aquatic health through river dolphins.)

Trujillo has dedicated his life to saving the Amazon’s river dolphins, and he was given another name by the Tikuna Indigenous people who live along the Amazon River in Colombia: omacha. At first he didn’t understand why. But after Trujillo figured out the reason, he realized the moniker was so apt he adopted it for his conservation organization. Omacha, in Tikuna culture, is the name of a dolphin that can transform into a man.

“For me, it’s a kind of magic to find dolphins in the forest,” he says. But these freshwater mammals are threatened by fisheries, mining, and deforestation. Trujillo, who’s part of the National Geographic and Rolex Perpetual Planet Amazon Expedition—a two-year scientific exploration of the river basin—collaborates with residents to develop dolphin-friendly practices that won’t interfere with subsistence fishing. He’s also helped create policies such as the 2023 Global Declaration for River Dolphins, which aims to preserve cetaceans in rivers around the globe.

(This conservationist has a mission: Save the Amazon's dolphins.)

​Look for more information about our Amazon expedition in coming months, including a special issue this fall. We’ll also launch an immersive digital experience at natgeo.com in September, and a documentary will premiere October 10 on National Geographic and stream on Disney+ and Hulu.
This story appears in the June 2024 issue of National Geographic magazine.

Go Further