| Biotic Setting | Benthic/Attached Biota |
| Biotic Class | Microbial Communities |
| Biotic Subclass | Mat/Film Forming Microbes |
| Biotic Group | Microphytobenthos Bacterial Mat/Film Bacterial Decay Vent Microbes |
| Definition | Areas dominated by microbes that form soft structures, generally through accumulations of conspecifics and other microbes into a matrix that appears as strands, a thin film, or a thicker mat. |