| 2 - Benthic Attached Biota |
| 2.2.1.20.2.1 - Ostrea lurida |
| 2.2.2 - Soft Sediment Fauna |
| 2.2.2.14 - Clam Bed |
| 2.2.2.6 - Tunneling Megafauna |
| 2.5 - Aquatic Bed |
| 2.5.1 - Benthic Macroalgae |
| 2.5.1.4 - Filamentous Algae |
| 2.5.1.5 - Leathery Algae |
| 2.5.1.7 - Sheet Algae |
| 2.5.2 - Aquatic Vascular Vegetation |
| 2.5.2.1 - Seagrass Bed |
| 2.5.2.1.16 - Zostera Marina |
| 2.5.2.1.17 - Zostera Japonica |
| 2.6 - Emergent Wetland |
| 2.6.1 - Emergent Tidal Marsh |
| 2.6.1.1 - Brackish Marsh |
| 2.7 - Scrub-Shrub Wetland |
| 2.7.1 - Tidal Scrub-Shrub Wetland |
| 2.7.1.1 - Brackish Tidal Scrub-Shrub |
| 2.8 - Forested Wetland |
| 2.8.1 - Tidal Forest/Woodland |
| 9.9.9.9.9 - Unclassified |
| 1.1 - Rock Substrate |
| 1.1.1 - Bedrock |
| 1.2 - Unconsolidated Mineral Substrate |
| 1.2.1.1 - Gravel |
| 1.2.1.1.1 - Boulder |
| 1.2.1.2 - Gravel Mixes |
| 1.2.1.2.2 - Muddy Sandy Gravel |
| 1.2.1.2.3 - Muddy Gravel |
| 1.2.1.3 - Gravelly |
| 1.2.1.3.1 - Gravelly Sand |
| 1.2.1.3.2 - Gravelly Muddy Sand |
| 1.2.1.3.3 - Gravelly Mud |
| 1.2.2 - Fine Unconsolidated Substrate |
| 1.2.2.1 - Slightly Gravelly |
| 1.2.2.1.1 - Slightly Gravelly Sand |
| 1.2.2.1.2 - Slightly Gravelly Muddy Sand |
| 1.2.2.1.3 - Slightly Gravelly Sandy Mud |
| 1.2.2.1.4 - Slightly Gravelly Mud |
| 1.2.2.2 - Sand |
| 1.2.2.2.3 - Medium Sand |
| 1.2.2.2.4 - Fine Sand |
| 1.2.2.3 - Muddy Sand |
| 1.2.2.3.1 - Silty Sand |
| 1.2.2.3.3 - Clayey Sand |
| 1.2.2.4 - Sandy Mud |
| 1.2.2.4.1 - Sandy Silt |
| 1.2.2.5 - Mud |
| 2 - Biogenic Substrate |
| 2.3.1.2 - Woody Debris |
| 2.5 - Shell Substrate |
| 3 - Anthropogenic Substrate |
| 3.1 - Anthropogenic Rock |
| 3.1.2 - Anthropogenic Rock Rubble |
| 3.1.3 - Anthropogenic Rock Hash |
| 3.3 - Construction Materials |
| 9.9.9.9.9 - Unclassified |
| 1.1 - Rock Substrate |
| 1.1.1 - Bedrock |
| 1.2 - Unconsolidated Mineral Substrate |
| 1.2.1 - Coarse Unconsolidated Substrate |
| 1.2.1.1 - Gravel |
| 1.2.1.1.1 - Boulder |
| 1.2.1.2 - Gravel Mixes |
| 1.2.1.2.1 - Sandy Gravel |
| 1.2.1.2.2 - Muddy Sandy Gravel |
| 1.2.1.2.3 - Muddy Gravel |
| 1.2.1.3 - Gravelly |
| 1.2.1.3.1 - Gravelly Sand |
| 1.2.1.3.2 - Gravelly Muddy Sand |
| 1.2.1.3.3 - Gravelly Mud |
| 1.2.2 - Fine Unconsolidated Substrate |
| 1.2.2.1 - Slightly Gravelly |
| 1.2.2.1.1 - Slightly Gravelly Sand |
| 1.2.2.1.2 - Slightly Gravelly Muddy Sand |
| 1.2.2.1.3 - Slightly Gravelly Sandy Mud |
| 1.2.2.1.4 - Slightly Gravelly Mud |
| 1.2.2.2 - Sand |
| 1.2.2.2.3 - Medium Sand |
| 1.2.2.2.4 - Fine Sand |
| 1.2.2.3 - Muddy Sand |
| 1.2.2.3.1 - Silty Sand |
| 1.2.2.3.3 - Clayey Sand |
| 1.2.2.4 - Sandy Mud |
| 1.2.2.4.1 - Sandy Silt |
| 1.2.2.5 - Mud |
| 2 - Biogenic Substrate |
| 2.3.1.2 - Woody Debris |
| 2.5 - Shell Substrate |
| 3 - Anthropogenic Substrate |
| 3.1 - Anthropogenic Rock |
| 3.1.2 - Anthropogenic Rock Rubble |
| 3.1.3 - Anthropogenic Rock Hash |
| 3.3 - Construction Materials |
| 9.9.9.9.9 - Unclassified |