| Biotic Setting | Benthic/Attached Biota |
| Biotic Class | Faunal Bed |
| Biotic Subclass | Attached Fauna |
| Biotic Group | Attached Oysters |
| Biotic Community | Attached Crassostrea Attached Ostrea |
| Definition | Areas dominated by fauna that consists of accumulations of oysters attached to a substrate other than conspecifics. Areas where oysters have constructed substrate are classified as Oyster Reef (see above). Areas where oysters are not attached to the substrate are classified as Soft Sediment Oyster Bed. |