Bottom Depth Range: 250-575 feet (76-175 meters)
Horseshoe Bank, located between East and West Flower Garden Banks, was unknown until NOAA conducted high resolution multibeam mapping surveys in the area in 2004. The name was suggested because of the feature's shape and became official in 2015.
This effort revealed thousands of patch reefs providing habitat for mesophotic corals, sponges, algae, invertebrates and fish. It also included a few mud volcanos (the raised bumps inside the horseshoe shape on the map above).
Horseshoe Bank was named by sanctuary research staff based on the overall shape of the feature.