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Offshore (deep) circalittoral habitats with coarse sand may support populations of the interstitial polychaete Hesionura elongata with Protodorvillea kefersteini. Other notable species include the phyllodocid polychaete Protomystides limbata and the bivalve Moerella pygmaea. This biotope was reported in the offshore northern North Sea by Eleftheriou and Basford (1989). Relatively little data exists for this biotope.