part of marine neritic benthic zone biome mussel bed neritic mussel bed https://cmecscatalog.org/cmecs/classification/unit/532.html This class extends the Coastal and Marine Ecological Classification Standard (CMECS). In ENVO, we may adapt the definition for consistency, but the semantics (meaning) of the term should be unaffected. Please consult the CMECS catalogue (https://cmecscatalog.org/) for authoritative and semantically unconstrained definitions. If individual mussels are present in densities sufficient to construct biogenic substrate, please use the mussel reef class. envoCmecs envoMarine A mussel bed which is located in benthic regions that are part of a continental shelf.