Sponge crusts, anemones and Tubularia indivisa in shallow infralittoral surge gullies
|Marine Habitat Classification for Britain and Ireland Version 97.06
|Shallow, vertical or overhanging very exposed and exposed bedrock gullies, tunnels and cave entrances that are subject to strong wave-surge and characterised by sponge crusts (such as Halichondria panicea, Myxilla incrustans and Leucosolenia botryoides), anemones (such as Sagartia elegans and dwarf Metridium senile), and often dense aggregations of Tubularia indivisa and patches of small mussels Mytilus edulis. Some patches of colonial ascidians may occur, but they never dominate the biotope (compare with EIR.SCAs). Corynactis viridis and Alcyonium digitatum may both occur, but only ever at low to moderate abundances (compare with IR.CorMetAlc) due to the high degree of wave-surge at such shallow depths.
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