The California freshwater shrimp, an endangered species found only in a handful of Marin, Sonoma and Napa watersheds, appears to be making a comeback in Olema Creek. A team of biologists from the National Park Service recently discovered some of the delicate crustaceans a half-mile farther upstream than they had previously been spotted. “California Freshwater Shrimp continue to make strides in Olema Creek!” the team declared last month in an Instagram post adorned with four…