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Very sheltered to extremely sheltered bedrock and stable boulders in the eulittoral zone that are subject to reduced salinity and characterised by the wrack Fucus ceranoides. Species richness is typically low in this biotope. The green seaweeds Ulva intestinalis and Ulva lactuca may be present together with the crab Carcinus maenas and the occasional barnacle Austrominius modestus and Semibalanus balanoides.