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Sponge Bed (Biotic Group)

Component: Biotic

Unique Identifier: 1223

Biotic Setting Benthic/Attached Biota
Biotic Class Faunal Bed
Biotic Subclass Soft Sediment Fauna
Biotic Group Sponge Bed
Biotic Community Tetilla mutabilis Bed
Monoraphis Bed

Definition Sandy or muddy areas of the seafloor that are dominated by sponges and their associated communities, but do not create substrate such that they would be considered Reef Biota. Hexactinellid "glass sponges" that are capable of forming reefs may be classified as a Sponge Bed when occurring on sand or mud in densities not deemed adequate to compose a reef. Many sponge species have developed holdfast organs that adapt them to life in soft sediments, and can provide excellent structural habitat for other creatures, including the many commensal organisms that typically inhabit the tissues of living sponges.