neritic mussel reef The CMECs classification references shelf reefs in the definition. Thus this term is focused only on mussel reefs that are neritic. A marine reef which is located on a shelf (i.e. in the neritic zone) and primarily composed of self-adhered or conglomerated mussel shells. envoCmecs envoMarine CMECS:338 https://cmecscatalog.org/cmecs/classification/unit/338.html This class aligns to 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. mussel reef