Bloomberg Green: Sea Urchin Ranchers Try to Stop a Delicacy From Killing the Oceans

On one of his last dive trips for sea urchins, Jeff Maassen dropped anchor off the backside of San Miguel, the most westerly and windswept of California’s Channel Islands. He squeezed his lanky 6-foot-1-inch frame into flippers, gloves, and a thick wetsuit, and jumped into the Pacific Ocean with a splash.