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Attached Starfish (Biotic Group)

Component: Biotic

Unique Identifier: 1218

Biotic Setting Benthic/Attached Biota
Biotic Class Faunal Bed
Biotic Subclass Attached Fauna
Biotic Group Attached Starfish
Biotic Community Attached Pisaster
Attached Asterias

Definition Hard or mixed substrate areas in which starfish (sea stars) occur in large aggregations and clearly dominate the biota. Practitioners should note that, in most cases, starfish are predators on another Biotic Group (e.g., Attached Mussels) which (as the forage base) would normally constitute the dominant percent cover. In those cases, Starfish would be described as a Co-occurring Element, e.g., "Biotic Group: Attached Mytilus edulis with Co-occurring Element: Attached Asterias rubens". The Attached Starfish biotic group is intended to describe areas where starfish constitute the dominant life form in percent cover, not areas with occasional or scattered starfish.