20230519 12573600 1.0 TRUE Structure The major geomorphologic coral reef and hard bottom classes includes areas of both shallow and deep-water seafloor with solid substrates including Rock Outcrop, Boulder, Spur and Groove, Individual Patch Reef, Aggregated Patch Reefs, Aggregate Reef, Reef Rubble, Pavement, Pavement with Sand Channels, and Rhodoliths. NOAA/NOS/NCCOS/MSE/Biogeography Branch