Elkhorn coral is one of the easiest coral species to identify because of its antler-like branches. It is a member of the acropora family of corals. These corals can grow to over a dozen feet in diameter. Their wide branches can be found covering many reefs just below the tide line. This specimen was found in the Florida Keys National Marine Sanctuary. The image was captured by photographer Paige Gill from the National Oceanic and Atmospheric Administration (NOAA).