adjacent to shoreline aquatic estuarine layer estuarine coastal surface layer CMECS:595 A layer of estuarine water which extends a few centimeters from the surface of the water column towards the estuary bed and from the shore to a fiat boundary where the estuary bed below the water column reaches a depth of 4 meters. envoMarine envoCmecs 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. https://cmecscatalog.org/cmecs/classification/unit/595.html liquid air-water interface layer surface of an astronomical body