has part composed primarily of marine faunal bed https://cmecscatalog.org/cmecs/classification/unit/391.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. An excerpt of the CMECS description: "Faunal Beds are highly dependent on substrate type. Individual species and entire biotic communities have adapted specialized anatomies and behaviors for survival on hard substrates; other species and communities have specialized and developed adaptations for life on soft substrates. Generalist fauna also occur (e.g., certain holothurians, crustaceans, and sponges) that can succeed on both substrate types. However, substrate type is such a defining aspect of the Faunal Bed class that CMECS Faunal Bed subclasses are assigned as physical-biological associations involving both biota and substrate." envoMarine envoCmecs A marine bed which is covered by animals which have benthic habitats, including attached, clinging, sessile, infaunal, burrowing, laying, interstitial, and slow-moving animals, but not animals that have created substrate. faunal bed CMECS:391 "Mid-depth", present in many CMECS classes, is ambiguous and needs refinement. marine bed Metazoa ecological community