On a blue-sky afternoon, kayakers paddle past dozens of sea lions lolling in the sun and make a beeline toward the sea otters lounging on beds of eel grass at Elkhorn Slough on California’s central coast. The playful predators not only generate millions of dollars in tourism revenue, but their voracious appetite for destructive species has revived this sprawling estuary while making the region’s carbon-sequestering kelp forests more resistant to climate change.

The U.S. government determined in 2022 that reintroducing sea otters to their historic range on the West Coast would be a boon to biodiversity and climate resilience, laying out a road map to restoration that would cost up to $43 million.

But as the Trump administration moves to slash funding for wildlife programs, a nonprof

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