| ba1, Littoral rock and other hard substrata |
| ba1.1, High energy littoral rock |
| ba1.2, Moderate energy littoral rock |
| ba1.3, Low energy littoral rock |
| ba2, Littoral sediment |
| ba2.2, Littoral sand |
| ba2.3, Littoral mud |
| ba2.5, Saltmarsh and reedbeds |
| ba2.6, Mangrove |
| ba2.7, Littoral seagrass beds |
| ba3, Infralittoral rock and other hard substrata |
| ba3.1, High energy infralittoral rock |
| ba3.2, Moderate energy infralittoral rock |
| ba3.3, Low energy infralittoral rock |
| ba4, Circalittoral rock and other hard substrata |
| ba4.1, High energy open-coast circalittoral rock |
| ba4.2, Tide-swept channels of circalittoral rock |
| ba5, Sublittoral sediment |
| ba5.1, Sublittoral coarse sediment |
| ba5.2, Sublittoral sand and muddy sand |
| ba5.3, Sublittoral mud |
| ba5.4, Sublittoral mixed sediments |
| ba5.5, Sublittoral rhodolith beds |
| ba5.6, Sublittoral biogenic reefs |
| ba5.7, Sublittoral seaweed on sediment |
| ba5.8, Sublittoral seagrass beds |
| ba5.b, Non-reef sediment epibenthos |
| ba5.c, Sublittoral sand 2 - Port Phillip Bay |
| ba5.d, Sublittoral mud 2 - Port Phillip Bay |
| baz, Unassigned marine |