Coffins Patch is a shallow coral reef (patch reef) located within the Florida Keys National Marine Sanctuary. It lies to the southeast of Bamboo Key. This reef lies within a Sanctuary Preservation Area (SPA). References NOAA National Marine Sanctuary Maps, Florida Keys East NOAA website on Coffins Patch NOAA Navigational Chart 11453 External links Benthic Habitat Map Coral reefs of the Florida Keys