| Biotic Setting | Benthic/Attached Biota |
| Biotic Class | Faunal Bed |
| Biotic Subclass | Soft Sediment Fauna |
| Biotic Group | Oyster Bed |
| Biotic Community | Crassostrea Bed Ostrea Bed |
| Definition | Soft-sediment areas dominated by oyster species that are not attached to a hard substrate and are not present in densities sufficient to construct substrate. These animals may be resting on the sediment surface, partially embedded in the sediment, or attached to conspecifics. |