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LR.FLR.CvOv.FaCr Faunal crusts on wave-surged littoral cave walls

Published date 2015-03

The inner walls of caves, predominantly in the mid shore in wave-surged conditions dominated by barnacles Semibalanus balanoides, and Verruca stroemia, with patches of encrusting sponges such as Halic...


M.AtLB.Co.SolScl Solitary scleractinian field on Atlantic lower bathyal coarse sediment

Published date 2015-03

This broad community is characterised by dense aggregations of solitary cup corals (Caryophylliidae and / or Flabellidae) on sediments including mud and sandy mud and coarse sediments. The species com...


M.AtMB.Mu.DeeSpo Deep sponge aggregation on Atlantic mid bathyal mud

Published date 2015-03

This broad community contains assemblages where sponges dominate sediment habitats. Sponges can be of all morphotypes except encrusting. Aggregations of the glass sponge Pheronema carpenteri have been...


M.AtUA Atlantic upper abyssal

Published date 2015-03

Atlantic waters are warm (typically >8°C within the UK) and Atlantic seabed habitats occur around most of the UK, excluding depths greater than 300 m in the Faroe-Shetland Channel. The Atlantic upper...


CR.MCR.EcCr.CarSwi.LgAs Caryophyllia smithii, Swiftia pallida and large solitary ascidians on exposed or moderately exposed circalittoral rock

Published date 2015-03

This variant typically occurs on exposed to moderately wave-exposed, circalittoral bedrock and boulders rock subject to mainly weak tidal streams and has a thin layer of silt present. It is found pred...


M.AtLB Atlantic lower bathyal

Published date 2015-03

Atlantic waters are warm (typically >8°C within the UK) and Atlantic seabed habitats occur around most of the UK, excluding depths greater than 300 m in the Faroe-Shetland Channel. The Atlantic lower...


CR.LCR.BrAs.AmenCio.Bri Dense brittlestars with sparse Ascidia mentula and Ciona intestinalis on sheltered circalittoral mixed substrata

Published date 2015-03

This biotope is typically found on wave-sheltered sites (although it may be found in wave-exposed through to extremely wave-sheltered conditions), on circalittoral mixed substrata (Bedrock, boulders, ...


M.AtMA Atlantic mid abyssal

Published date 2015-03

Atlantic waters are warm (typically >8°C within the UK) and Atlantic seabed habitats occur around most of the UK, excluding depths greater than 300 m in the Faroe-Shetland Channel. The Atlantic mid a...


M.ArMB Arctic mid bathyal

Published date 2015-03

Within the UK, Arctic seabed habitats occur at depths greater than 600 m in the Faroe-Shetland Channel. The cooler Arctic waters (typically below 0°C) are subducted below Atlantic waters meaning the u...


CR.MCR.CSab Circalittoral Sabellaria reefs (on rock)

Published date 2015-03

This biotope complex occurs on moderately wave-exposed, circalittoral bedrock, boulders and cobbles subject to moderately strong tidal streams. It is characterised by dense crusts of the polychaete Sa...



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