|Biotic Setting||Benthic/Attached Biota
|Biotic Class||Reef Biota
|Biotic Subclass||Deepwater/Coldwater Coral Reef Biota
Shallow/Mesophotic Coral Reef Biota
Glass Sponge Reef Biota
Mollusk Reef Biota
Worm Reef Biota
|Definition||Areas dominated by reef-building fauna, including living corals, mollusks, polychaetes or glass sponges.
In order to be classified as Reef Biota, colonizing organisms must be judged to be sufficiently abundant to construct identifiable biogenic substrates. When not present in densities sufficient to construct reef substrate, the biota is classified in the Aquatic Vegetation Bed or Faunal Bed classes.
The Reef Biota Class refers to only the living component of reef structures. If referring to the reef structure, users should use the reef units in the Geoform Component. If referring to the composition of the reef substrate independent of the living cover, users should employ the Coral Substrate, Shell Substrate, or Worm Substrate Classes in the Substrate Component (SC).