occurs in ocean sea estuary marine tidal flow process 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. A tidal flow process which occurs in an ocean or sea and during which tidal movements generate advective flows, often amplified in velocity when moving through an inlet, pass or channel. CMECS:643 tidal flow envoMarine https://cmecscatalog.org/cmecs/classification/unit/643.html envoCmecs tidal flow process