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Holothurian Bed (Biotic Group)

Component: Biotic

Unique Identifier: 530

Biotic Setting Benthic/Attached Biota
Biotic Class Faunal Bed
Biotic Subclass Soft Sediment Fauna
Biotic Group Holothurian Bed
Biotic Community Kolga Bed
Stichopus Bed
Caudina Bed
Leptosynapta Bed


Description
Definition Soft sediment assemblages dominated by holothurians or "sea cucumbers", which are common in both shallow and deep areas of the ocean. Holothurians common on sand or mud bottoms generally have features adapting them to life in soft sediment, and many species feed by ingesting sediment and associated organic matter as they burrow through the substrate. Tracks, trails, or feces left by these echinoderms may also be characteristic (see Fecal Mounds, also Tracks and Trails in the Inferred Fauna section below). The Holothurian Bed group is used only when the holothurians are present; use the Tracks and Trails or Fecal Mounds Biotic Groups when there is evidence of their presence, but living individuals are not seen.