In the galaxy of shimmering sea stars, none shone brighter than the spectacular sunflower star. Bigger, bolder and hungrier than any of its kin, Pycnopodia helianthoides could unfurl as many as two dozen arms, rocket across the ocean floor and devour a purple sea urchin in moments. As an apex predator—dubbed the “Death Star” by awed divers—it feared none and was feared by all.
Then, almost overnight, it vanished.
Beginning in 2013, a virulent epidemic known as Sea Star Wasting Syndrome swept the Pacific Coast, killing more than 95 percent of sunflower sea stars — one of the most severe marine wildlife die-offs ever recorded. The loss of these “cheetahs of the sea” triggered a cascade of consequences. Without their primary predator, purple sea urchins multiplied into legions and grazed once-lush kelp forests—already weakened by marine heat waves—down to bleak urchin barrens.
Now, along the foggy coast of Northern California, something new is sprouting: hope.
This hope is rooted partly in cutting-edge science. After years of experimentation, researchers at the University of Washington Friday Harbor Marine Laboratories reached a milestone once thought impossible: breeding sunflower stars under conditions that closely mimic the ocean. Other institutions have also reported successful spawns.
In late 2025, the Sunflower Star Laboratory at Moss Landing achieved a California first, temporarily placing juvenile sunflower stars raised under human care into their natural marine environment. After nearly a month in the sea, approximately 98 percent survived, a powerful testimony to the potential of future restoration. In another breakthrough, scientists with the San Diego Zoo Wildlife Alliance have cryopreserved sunflower star larvae—freezing them as a genetic safeguard for future reintroduction efforts.
Yet science is only part of the story.
Against all odds, sunflower stars appear to be returning on their own. After years with no confirmed sightings, the first appearances were documented in 2024, followed by additional sightings along the Sonoma and Mendocino coasts in 2025. The newcomers include not just adults but also babies and juveniles, living proof of successful reproduction in the wild.
During the stars’ long absence, a remarkable coalition of scientists, fishermen, Tribal leaders, divers and community members has been quietly preparing for their return. As chronicled in The Last Forests, a compelling documentary on the project, the Pacific Coast Ocean Restoration Initiative brought together nonprofits such as The Nature Conservancy, government agencies, the Kashia and other Pomo tribes, academic institutions and community members.
Through years of trial and error, scientists learned how to grow kelp from microscopic spores into reproductive adults. Planted on floating vertical nurseries suspended in the water column, young kelp can grow and thrive beyond the reach of seafloor-dwelling urchins.
Divers, both commercial and volunteer, have played an equally vital role. Over countless hours in frigid waters, they’ve removed millions of purple sea urchins—totaling thousands of tons—to establish “kelp oasis” sites where the forests can once again take hold.
“What I want people to know about kelp restoration in California,” says Tristin McHugh, the Nature Conservancy’s kelp project director, “is that a lot of really smart people are working really hard—above water and below—to understand what we can do so we don’t lose this incredible ecosystem.”
To me, these efforts represent a field or, more precisely, a sea of dreams, built on a simple but profound belief: that if we rebuild the conditions that allow them to flourish, they will come back–the kelp, the sunflower sea stars and the thousands of other marine creatures whose fates are bound together beneath the waves.
