These images of Arrecife Alacranes–Spanish for “Scorpion Reef,”–were acquired on November 5, 2014, by the Operational Land Imager (OLI) on Landsat 8.

These images of Arrecife AlacranesSpanish for “Scorpion Reef,”were acquired on November 5, 2014, by the Operational Land Imager (OLI) on Landsat 8.

The Arrecife Alacranes — or Scorpion Reef — is 13 miles (21 km) wide and is considered the largest coral structure in the southern Gulf of Mexico. The reef, formed by a multitude of tiny coral ...