Lucero emerged from the Pacific waves under cover of darkness, her massive shell glinting as she hauled herself onto a remote stretch of Ecuadorian sand. At an estimated 25 to 40 years old, weighing some 2,000 pounds, this leatherback sea turtle was about to do something remarkable—and to help researchers understand how to save her vanishing kind.
Scientists with Ecuador-based Fundacion Reina Laud first spotted Lucero—a name meaning "morning star" in Spanish—swimming toward the shore at Playa Pajonal. They immediately called Callie Veelenturf, a marine conservation biologist and founder of The Leatherback Project, who had been working with the team. The researchers stationed themselves along the entire length of the beach with radios, not knowing exactly where Lucero would emerge.
"It was really quite an adventure because we just spent multiple nights out on the beach waiting for her," Veelenturf told Mongabay.
When leatherbacks nest, they enter a trance-like state, seemingly unaware of activity around them. That moment gave the team a rare window to attach a satellite tag to the top of Lucero's shell. Now, each time she surfaces to breathe, the device pings a satellite and transmits information about her location, diving depth, and movements.
Lucero is the first nesting leatherback sea turtle ever tagged in Ecuador—the southernmost edge of the species' nesting range in the Eastern Pacific. Fewer than 1,000 of these ancient mariners remain in these waters, down from far greater numbers just decades ago. The subpopulation has declined by roughly 98 percent over the last several decades, making every turtle's journey critical data for conservation.
"Every day I check it and hold my breath and wait to see the transmitting signal," Veelenturf said.
Since laying her eggs, Lucero has already migrated south to the coastal waters of Peru, according to the tracker. The tag could stay attached for a year or two, and Veelenturf hopes it will trace her full migration route and reveal her foraging grounds.
The information couldn't come at a more urgent time. One of the biggest threats to leatherbacks is getting caught in fishing nets as bycatch—deadly for the turtles and costly for fishers whose gear is damaged. By understanding where these turtles travel and how deep they dive, researchers can better advise fishing communities on how to avoid the zones where turtles congregate.
But there's more at stake than just saving a species. Leatherbacks consume their body weight in jellyfish every single day, and jellyfish voraciously eat juvenile fish and fish larvae. "So when you have a healthy leatherback population, it supports healthy fish stocks and fishing communities in turn," Veelenturf explained.
In this way, protecting Lucero's kind may be key to protecting the livelihoods of the fishers who once saw them as a nuisance—a connection that could transform how coastal communities see these gentle giants.