Goat Rock Beach, Sonoma Coast State Park by Guy Miller. Oct 16, 2020 · Jenner, CA· “Went to Goat Rock last night to take advantage of the moonless night to photograph the Milky Way. What I didn’t expect was to see a bioluminescent display in the breaking waves. The glowing blue light is caused by a marine microorganism, a single-celled creature called a dinoflagellate. Through a chemical reaction they glow when disturbed by the breaking waves. It was truly a magical scene.”