Degraded elkhorn reefs. One of the causes of reef degradation is hurricanes. In the 2017 hurricane Irma had a strong impact on the shallow reef of Bonaire, which normally is out of the way of hurricanes. Coral Restoration Project on Bonaire Technical Details Camera: NIKON D800 Taken: November 16, 2016 Focal length: 10mm Aperture: f/45 Exposure: 1/250 second ISO: 200