All habitats A - Marine habitats A1 - Littoral rock and other hard substrata A1.1 - High energy littoral rock A1.11 - Mussel and/or barnacle communities A1.111 - Mytilus edulis and barnacles on very exposed eulittoral rock A1.112 - Chthamalus spp. on exposed upper eulittoral rock A1.1121 - Chthamalus montagui and Chthamalus stellatus on exposed upper eulittoral rock A1.1122 - Chthamalus spp. and Lichina pygmaea on steep exposed upper eulittoral rock A1.113 - Semibalanus balanoides on exposed to moderately exposed or vertical sheltered eulittoral rock A1.1131 - Semibalanus balanoides , Patella vulgata and Littorina spp. on exposed to moderately exposed or vertical sheltered eulittoral rock A1.1132 - Semibalanus balanoides , Fucus vesiculosus and red seaweeds on exposed to moderately exposed eulittoral rock A1.1133 - Semibalanus balanoides and Littorina spp. on exposed to moderately exposed eulittoral boulders and cobbles A1.12 - Robust fucoid and/or red seaweed communities A1.121 - Fucus distichus and Fucus spiralis f. nana on extremely exposed upper eulittoral rock A1.122 - Corallina officinalis on exposed to moderately exposed lower eulittoral rock A1.1221 - Corallina officinalis and Mastocarpus stellatus on exposed to moderately exposed lower eulittoral rock A1.1222 - Corallina officinalis , Himanthalia elongata and Patella ulyssiponensis on very exposed lower eulittoral rock A1.123 - Himanthalia elongata and red seaweeds on exposed lower eulittoral rock A1.124 - Palmaria palmata on very exposed to moderately exposed lower eulittoral rock A1.125 - Mastocarpus stellatus and Chondrus crispus on very exposed to moderately exposed lower eulittoral rock A1.126 - Osmundea pinnatifida on moderately exposed mid eulittoral rock A1.127 - Ceramium sp. and piddocks on eulittoral fossilised peat A1.14 - Mediterranean communities of lower mediolittoral rock very exposed to wave action A1.15 - Fucoids in tide-swept conditions A1.151 - Ascophyllum nodosum , sponges and ascidians on tide-swept mid eulittoral rock A1.152 - Fucus serratus , sponges and ascidians on tide-swept lower eulittoral rock A1.153 - Fucus serratus with sponges, ascidians and red seaweeds on tide-swept lower eulittoral mixed substrata A1.2 - Moderate energy littoral rock A1.21 - Barnacles and fucoids on moderately exposed shores A1.211 - Pelvetia canaliculata and barnacles on moderately exposed littoral fringe rock A1.212 - Fucus spiralis on full salinity exposed to moderately exposed upper eulittoral rock A1.213 - Fucus vesiculosus and barnacle mosaics on moderately exposed mid eulittoral rock A1.214 - Fucus serratus on moderately exposed lower eulittoral rock A1.2141 - Fucus serratus and red seaweeds on moderately exposed lower eulittoral rock A1.2142 - Fucus serratus and under-boulder fauna on exposed to moderately exposed lower eulittoral boulders A1.2143 - Fucus serratus and piddocks on lower eulittoral soft rock A1.215 - Rhodothamniella floridula on sand-scoured lower eulittoral rock A1.22 - Mussels and fucoids on moderately exposed shores A1.221 - Mytilus edulis and Fucus vesiculosus on moderately exposed mid eulittoral rock A1.222 - Mytilus edulis , Fucus serratus and red seaweeds on moderately exposed lower eulittoral rock A1.223 - Mytilus edulis and piddocks on eulittoral firm clay A1.3 - Low energy littoral rock A1.31 - Fucoids on sheltered marine shores A1.311 - Pelvetia canaliculata on sheltered littoral fringe rock A1.312 - Fucus spiralis on sheltered upper eulittoral rock A1.3121 - Fucus spiralis on full salinity sheltered upper eulittoral rock A1.3122 - Fucus spiralis on full salinity upper eulittoral mixed substrata A1.313 - Fucus vesiculosus on moderately exposed to sheltered mid eulittoral rock A1.3131 - Fucus vesiculosus on full salinity moderately exposed to sheltered mid eulittoral rock A1.3132 - Fucus vesiculosus on mid eulittoral mixed substrata A1.314 - Ascophyllum nodosum on very sheltered mid eulittoral rock A1.3141 - Ascophyllum nodosum on full salinity mid eulittoral rock A1.3142 - Ascophyllum nodosum on full salinity mid eulittoral mixed substrata A1.315 - Fucus serratus on sheltered lower eulittoral rock A1.3151 - Fucus serratus on full salinity sheltered lower eulittoral rock A1.3152 - Fucus serratus on full salinity lower eulittoral mixed substrata A1.32 - Fucoids in variable salinity A1.321 - Pelvetia canaliculata on sheltered variable salinity littoral fringe rock A1.322 - Fucus spiralis on sheltered variable salinity upper eulittoral rock A1.323 - Fucus vesiculosus on variable salinity mid eulittoral boulders and stable mixed substrata A1.324 - Ascophyllum nodosum and Fucus vesiculosus on variable salinity mid eulittoral rock A1.325 - Ascophyllum nodosum ecad. mackaii beds on extremely sheltered mid eulittoral mixed substrata A1.326 - Fucus serratus and large Mytilus edulis on variable salinity lower eulittoral rock A1.327 - Fucus ceranoides on reduced salinity eulittoral rock A1.4 - Features of littoral rock A1.41 - Communities of littoral rockpools A1.411 - Coralline crust-dominated shallow eulittoral rockpools A1.4111 - Coralline crusts and Corallina officinalis in shallow eulittoral rockpools A1.4112 - Coralline crusts and Paracentrotus lividus in shallow eulittoral rockpools A1.4113 - Bifurcaria bifurcata in shallow eulittoral rockpools A1.4114 - Cystoseira spp. in eulittoral rockpools A1.412 - Fucoids and kelp in deep eulittoral rockpools A1.4121 - Sargassum muticum in eulittoral rockpools A1.413 - Seaweeds in sediment-floored eulittoral rockpools A1.414 - Hydroids, ephemeral seaweeds and Littorina littorea in shallow eulittoral mixed substrata pools A1.42 - Communities of rockpools in the supralittoral zone A1.421 - Green seaweeds (Enteromorpha spp. and Cladophora spp.) in shallow upper shore rockpools A1.44 - Communities of littoral caves and overhangs A1.441 - Chrysophyceae and Haptophyceae on vertical upper littoral fringe soft rock A1.442 - Green algal films on upper and mid-shore cave walls and ceilings A1.443 - Audouinella purpurea and Pilinia maritima crusts on upper and mid-shore cave walls and ceilings A1.444 - Audouinella purpurea and Cladophora rupestris on upper to mid-shore cave walls A1.445 - Verrucaria mucosa and/or Hildenbrandia rubra on upper to mid shore cave walls A1.446 - Sponges and shade-tolerant red seaweeds on overhanging lower eulittoral bedrock and in cave entrances A1.4461 - Sponges, shade-tolerant red seaweeds and Dendrodoa grossularia on wave-surged overhanging lower eulittoral bedrock and caves A1.447 - Sponges, bryozoans and ascidians on deeply overhanging lower shore bedrock or caves A1.448 - Faunal crusts on wave-surged littoral cave walls A1.449 - Sparse fauna (barnacles and spirorbids) on sand/pebble-scoured rock in littoral caves A1.44A - Barren and/or boulder-scoured littoral cave walls and floors A1.45 - Ephemeral green or red seaweeds (freshwater or sand-influenced) on non-mobile substrata A1.451 - Enteromorpha spp. on freshwater-influenced and/or unstable upper eulittoral rock A1.452 - Porphyra purpurea or Enteromorpha spp. on sand-scoured mid or lower eulittoral rock A2 - Littoral sediment A2.1 - Littoral coarse sediment A2.11 - Shingle (pebble) and gravel shores A2.111 - Barren littoral shingle A2.112 - Pectenogammarus planicrurus in mid shore well-sorted gravel or coarse sand A2.2 - Littoral sand and muddy sand A2.21 - Strandline A2.211 - Talitrids on the upper shore and strandline A2.212 - Mytilus edulis and Fabricia sabella in littoral mixed sediment A2.22 - Barren or amphipod-dominated mobile sand shores A2.221 - Barren littoral coarse sand A2.222 - Oligochaetes in littoral mobile sand A2.2221 - Oligochaetes in full salinity littoral mobile sand A2.2222 - Oligochaetes in variable salinity littoral mobile sand A2.223 - Amphipods and Scolelepis spp. in littoral medium-fine sand A2.2231 - Scolelepis spp. in littoral mobile sand A2.2232 - Eurydice pulchra in littoral mobile sand A2.2233 - Pontocrates arenarius in littoral mobile sand A2.23 - Polychaete/amphipod-dominated fine sand shores A2.231 - Polychaetes in littoral fine sand A2.2311 - Polychaetes, including Paraonis fulgens , in littoral fine sand A2.2312 - Polychaetes and Angulus tenuis in littoral fine sand A2.2313 - Nephtys cirrosa -dominated littoral fine sand A2.24 - Polychaete/bivalve-dominated muddy sand shores A2.241 - Macoma balthica and Arenicola marina in muddy sand shores A2.242 - Cerastoderma edule and polychaetes in littoral muddy sand A2.243 - Hediste diversicolor , Macoma balthica and Eteone longa in littoral muddy sand A2.244 - Bathyporeia pilosa and Corophium arenarium in littoral muddy sand A2.245 - Lanice conchilega in littoral sand A2.3 - Littoral mud A2.31 - Polychaete/bivalve-dominated mid estuarine mud shores A2.311 - Nephtys hombergii , Macoma balthica and Streblospio shrubsolii in littoral sandy mud A2.312 - Hediste diversicolor and Macoma balthica in littoral sandy mud A2.313 - Hediste diversicolor , Macoma balthica and Scrobicularia plana in littoral sandy mud A2.32 - Polychaete/oligochaete-dominated upper estuarine mud shores A2.321 - Nephtys hombergii and Streblospio shrubsolii in littoral mud A2.322 - Hediste diversicolor in littoral mud A2.3221 - Hediste diversicolor and Streblospio shrubsolii in littoral sandy mud A2.3222 - Hediste diversicolor and Corophium volutator in littoral mud A2.3223 - Hediste diversicolor and oligochaetes in littoral mud A2.323 - Tubificoides benedii and other oligochaetes in littoral mud A2.324 - Saltmarsh pools A2.325 - Saltmarsh creeks A2.3251 - Erosion faces with Carcinus maenas A2.4 - Littoral mixed sediments A2.41 - Hediste diversicolor dominated gravelly sandy mud shores A2.411 - Hediste diversicolor in littoral gravelly muddy sand and gravelly sandy mud A2.4111 - Hediste diversicolor and Macoma balthica in littoral gravelly mud A2.4112 - Hediste diversicolor and Scrobicularia plana in littoral gravelly mud A2.4113 - Hediste diversicolor and Streblospio shrubsolii in littoral gravelly sandy mud A2.4114 - Hediste diversicolor , cirratulids and Tubificoides spp. in littoral gravelly sandy mud A2.4115 - Hediste diversicolor and Corophium volutator in littoral gravelly sandy mud A2.42 - Species-rich mixed sediment shores A2.421 - Cirratulids and Cerastoderma edule in littoral mixed sediment A2.43 - Species-poor mixed sediment shores A2.431 - Barnacles and Littorina spp. on unstable eulittoral mixed substrata A2.5 - Coastal saltmarshes and saline reedbeds A2.51 - Saltmarsh driftlines A2.511 - Atlantic saltmarsh and drift rough grass communities A2.514 - Elymus pycnanthus with Suaeda vera or Inula crithmoides saltmarsh driftlines A2.515 - Elymus repens saltmarsh driftlines A2.516 - Suaeda vera saltmarsh driftlines A2.517 - Suaeda vera - Limonium binervosum saltmarsh driftlines A2.518 - Spergularia marina - Puccinellia distans saltmarsh driftlines A2.519 - Frankenia laevis - Halimione portulacoides saltmarsh driftlines A2.51A - Inula crithmoides on saltmarshes A2.51B - Sagina maritima ephemeral salt marsh in sand A2.52 - Upper saltmarshes A2.521 - Atlantic and Baltic brackish saltmarsh communities A2.527 - Atlantic salt scrubs A2.53 - Mid-upper saltmarshes and saline and brackish reed, rush and sedge beds A2.531 - Atlantic upper shore communities A2.535 - Juncus maritimus mid-upper saltmarshes A2.536 - Juncus maritimus mid-upper saltmarshes with Triglochin maritima A2.537 - Eleocharis uniglumis mid-upper saltmarshes A2.538 - Blysmus rufus mid-upper saltmarshes A2.539 - Mid-upper saltmarshes: Artemisia maritima with Festuca rubra , or open canopy of Artemisia maritima and Halimione A2.53A - Festuca rubra mid-upper saltmarshes A2.53B - Mid-upper saltmarshes: sub-communities of Festuca rubra with Agrostis stolonifera , Juncus gerardi , Puccinellia maritima , Glaux maritima , Triglochin maritima , Armeria maritima and Plantago maritima A2.54 - Low-mid saltmarshes A2.541 - Atlantic saltmarsh grass lawns A2.542 - Atlantic lower shore communities A2.545 - Halimione portulacoides low-mid saltmarshes A2.548 - Annual Salicornia , Suaeda and Puccinellia maritima low-mid saltmarshes A2.55 - Pioneer saltmarshes A2.551 - Salicornia , Suaeda and Salsola pioneer saltmarshes A2.5512 - Suaeda maritima pioneer saltmarshes A2.5513 - Salicornia spp. pioneer saltmarshes A2.553 - Atlantic Sagina maritima communities A2.554 - Flat-leaved Spartina swards A2.5541 - Spartina anglica pioneer saltmarshes A2.5542 - Spartina alterniflora with Spartina anglica , Puccinellia maritima and Aster tripolium A2.5543 - Spartina maritima pioneer saltmarshes A2.556 - Rayed Aster tripolium pioneer saltmarshes A2.557 - Aster tripolium var. discoides pioneer saltmarshes A2.558 - Arthrocnemum perenne pioneer saltmarshes, sometimes with Halimione , Puccinellia and Suaeda A2.6 - Littoral sediments dominated by aquatic angiosperms A2.61 - Seagrass beds on littoral sediments A2.6111 - Zostera noltii beds in littoral muddy sand A2.7 - Littoral biogenic reefs A2.71 - Littoral Sabellaria reefs A2.711 - Sabellaria alveolata reefs on sand-abraded eulittoral rock A2.72 - Littoral mussel beds on sediment A2.721 - Mytilus edulis beds on littoral sediments A2.7211 - Mytilus edulis beds on littoral mixed substrata A2.7212 - Mytilus edulis beds on littoral sand A2.7213 - Mytilus edulis beds on littoral mud A2.8 - Features of littoral sediment A2.82 - Ephemeral green or red seaweeds (freshwater or sand-influenced) on mobile substrata A2.821 - Ephemeral green and red seaweeds on variable salinity and/or disturbed eulittoral mixed substrata A3 - Infralittoral rock and other hard substrata A3.1 - Atlantic and Mediterranean high energy infralittoral rock A3.11 - Kelp with cushion fauna and/or foliose red seaweeds A3.111 - Alaria esculenta on exposed sublittoral fringe bedrock A3.1111 - Alaria esculenta , Mytilus edulis and coralline crusts on very exposed sublittoral fringe bedrock A3.1112 - Alaria esculenta and Laminaria digitata on exposed sublittoral fringe bedrock A3.112 - Alaria esculenta forest with dense anemones and crustose sponges on extremely exposed infralittoral bedrock A3.113 - Laminaria hyperborea forest with a faunal cushion (sponges and polyclinids) and foliose red seaweeds on very exposed infralittoral rock A3.114 - Sparse Laminaria hyperborea and dense Paracentrotus lividus on exposed infralittoral limestone A3.115 - Laminaria hyperborea with dense foliose red seaweeds on exposed infralittoral rock A3.1151 - Laminaria hyperborea forest with dense foliose red seaweeds on exposed upper infralittoral rock A3.1152 - Laminaria hyperborea park with dense foliose red seaweeds on exposed lower infralittoral rock A3.1153 - Mixed Laminaria hyperborea and Laminaria ochroleuca forest on exposed infralittoral rock A3.116 - Foliose red seaweeds on exposed lower infralittoral rock A3.1161 - Foliose red seaweeds with dense Dictyota dichotoma and/or Dictyopteris membranacea on exposed lower infralittoral rock A3.117 - Laminaria hyperborea and red seaweeds on exposed vertical rock A3.12 - Sediment-affected or disturbed kelp and seaweed communities A3.121 - Saccorhiza polyschides and other opportunistic kelps on disturbed upper infralittoral rock A3.122 - Laminaria saccharina and/or Saccorhiza polyschides on exposed infralittoral rock A3.123 - Laminaria saccharina , Chorda filum and dense red seaweeds on shallow unstable infralittoral boulders and cobbles A3.124 - Dense Desmarestia spp. with filamentous red seaweeds on exposed infralittoral cobbles, pebbles and bedrock A3.125 - Mixed kelps with scour-tolerant and opportunistic foliose red seaweeds on scoured or sand-covered infralittoral rock A3.126 - Halidrys siliquosa and mixed kelps on tide-swept infralittoral rock with coarse sediment A3.127 - Polyides rotundus , Ahnfeltia plicata and Chondrus crispus on sand-covered infralittoral rock A3.2 - Atlantic and Mediterranean moderate energy infralittoral rock A3.21 - Kelp and red seaweeds (moderate energy infralittoral rock) A3.211 - Laminaria digitata on moderately exposed sublittoral fringe rock A3.2111 - Laminaria digitata on moderately exposed sublittoral fringe bedrock A3.2112 - Laminaria digitata and under-boulder fauna on sublittoral fringe boulders A3.2113 - Laminaria digitata and piddocks on sublittoral fringe soft rock A3.212 - Laminaria hyperborea on tide-swept, infralittoral rock A3.2121 - Laminaria hyperborea forest, foliose red seaweeds and a diverse fauna on tide-swept upper infralittoral rock A3.2122 - Laminaria hyperborea park with hydroids, bryozoans and sponges on tide-swept lower infralittoral rock A3.213 - Laminaria hyperborea on tide-swept infralittoral mixed substrata A3.2131 - Laminaria hyperborea forest and foliose red seaweeds on tide-swept upper infralittoral mixed substrata A3.2132 - Laminaria hyperborea park and foliose red seaweeds on tide-swept lower infralittoral mixed substrata A3.214 - Laminaria hyperborea and foliose red seaweeds on moderately exposed infralittoral rock A3.2141 - Laminaria hyperborea forest and foliose red seaweeds on moderately exposed upper infralittoral rock A3.2142 - Laminaria hyperborea park and foliose red seaweeds on moderately exposed lower infralittoral rock A3.2143 - Grazed Laminaria hyperborea forest with coralline crusts on upper infralittoral rock A3.2144 - Grazed Laminaria hyperborea park with coralline crusts on lower infralittoral rock A3.2145 - Sabellaria spinulosa with kelp and red seaweeds on sand-influenced infralittoral rock A3.215 - Dense foliose red seaweeds on silty moderately exposed infralittoral rock A3.216 - Laminaria hyperborea on moderately exposed vertical rock A3.217 - Hiatella arctica and seaweeds on vertical limestone / chalk A3.22 - Kelp and seaweed communities in tide-swept sheltered conditions A3.221 - Laminaria digitata , ascidians and bryozoans on tide-swept sublittoral fringe rock A3.222 - Mixed kelp with foliose red seaweeds, sponges and ascidians on sheltered tide-swept infralittoral rock A3.223 - Mixed kelp and red seaweeds on infralittoral boulders, cobbles and gravel in tidal rapids A3.224 - Laminaria saccharina with foliose red seaweeds and ascidians on sheltered tide-swept infralittoral rock A3.225 - Filamentous red seaweeds, sponges and Balanus crenatus on tide-swept variable-salinity infralittoral rock A3.247 - Ostrea edulis beds on shallow sublittoral muddy mixed sediment A3.3 - Atlantic and Mediterranean low energy infralittoral rock A3.31 - Silted kelp on low energy infralittoral rock with full salinity A3.311 - Mixed Laminaria hyperborea and Laminaria ochroleuca forest on moderately exposed or sheltered infralittoral rock A3.312 - Mixed Laminaria hyperborea and Laminaria saccharina on sheltered infralittoral rock A3.3121 - Mixed Laminaria hyperborea and Laminaria saccharina forest on sheltered upper infralittoral rock A3.3122 - Mixed Laminaria hyperborea and Laminaria saccharina park on sheltered lower infralittoral rock A3.3123 - Grazed, mixed Laminaria hyperborea and Laminaria saccharina on sheltered infralittoral rock A3.313 - Laminaria saccharina on very sheltered infralittoral rock A3.3131 - Laminaria saccharina and Laminaria digitata on sheltered sublittoral fringe rock A3.3132 - Laminaria saccharina forest on very sheltered upper infralittoral rock A3.3133 - Laminaria saccharina park on very sheltered lower infralittoral rock A3.3134 - Grazed Laminaria saccharina with Echinus , brittlestars and coralline crusts on sheltered infralittoral rock A3.314 - Silted cape-form Laminaria hyperborea on very sheltered infralittoral rock A3.315 - Sargassum muticum on shallow slightly tide-swept infralittoral mixed substrata A3.32 - Kelp in variable salinity on low energy infralittoral rock A3.321 - Codium spp. with red seaweeds and sparse Laminaria saccharina on shallow, heavily-silted, very sheltered infralittoral rock A3.322 - Laminaria saccharina and Psammechinus miliaris on variable salinity grazed infralittoral rock A3.323 - Laminaria saccharina with Phyllophora spp. and filamentous green seaweeds on variable or reduced salinity infralittoral rock A3.34 - Submerged fucoids, green or red seaweeds (low salinity infralittoral rock) A3.341 - Mixed fucoids, Chorda filum and green seaweeds on reduced salinity infralittoral rock A3.342 - Ascophyllum nodosum and epiphytic sponges and ascidians on variable salinity infralittoral rock A3.343 - Polyides rotundus and/or Furcellaria lumbricalis on reduced salinity infralittoral rock A3.344 - Fucus ceranoides and Enteromorpha spp. on low salinity infralittoral rock A3.36 - Faunal communities on variable or reduced salinity infralittoral rock A3.361 - Mytilus edulis beds on reduced salinity infralittoral rock A3.362 - Cordylophora caspia and Electra crustulenta on reduced salinity infralittoral rock A3.363 - Hartlaubella gelatinosa and Conopeum reticulum on low salinity infralittoral mixed substrata A3.7 - Features of infralittoral rock A3.71 - Robust faunal cushions and crusts in surge gullies and caves A3.711 - Foliose seaweeds and coralline crusts in surge gully entrances A3.712 - Anemones, including Corynactis viridis, crustose sponges and colonial ascidians on very exposed or wave surged vertical infralittoral rock A3.713 - Crustose sponges and colonial ascidians with Dendrodoa grossularia or barnacles on wave-surged infralittoral rock A3.714 - Dendrodoa grossularia and Clathrina coriacea on wave-surged vertical infralittoral rock A3.715 - Crustose sponges on extremely wave-surged infralittoral cave or gully walls A3.716 - Coralline crusts in surge gullies and scoured infralittoral rock A3.7161 - Balanus crenatus and/or Pomatoceros triqueter with spirorbid worms and coralline crusts on severely scoured vertical infralittoral rock A3.7162 - Coralline crusts and crustaceans on mobile boulders or cobbles in surge gullies A3.72 - Infralittoral fouling seaweed communities A3.A4 - Infralittoral rock and other hard substrata/Circalittoral A4 - Circalittoral rock and other hard substrata A4.1 - Atlantic and Mediterranean high energy circalittoral rock A4.11 - Very tide-swept faunal communities on circalittoral rock A4.111 - Balanus crenatus and Tubularia indivisa on extremely tide-swept circalittoral rock A4.112 - Tubularia indivisa on tide-swept circalittoral rock A4.1121 - Tubularia indivisa and cushion sponges on tide-swept turbid circalittoral bedrock A4.1122 - Alcyonium digitatum with dense Tubularia indivisa and anemones on strongly tide-swept circalittoral rock A4.12 - Sponge communities on deep circalittoral rock A4.121 - Phakellia ventilabrum and axinellid sponges on deep, wave-exposed circalittoral rock A4.13 - Mixed faunal turf communities on circalittoral rock A4.131 - Bryozoan turf and erect sponges on tide-swept circalittoral rock A4.131, - Subtidal rock with Ross 'coral' Pentapora foliacea A4.1311 - Eunicella verrucosa and Pentapora foliacea on wave-exposed circalittoral rock A4.1312 - Mixed turf of bryozoans and erect sponges with Dysidia fragilis and Actinothoe sphyrodeta on tide-swept wave-exposed circalittoral rock A4.1313 - Mixed turf of bryozoans and erect sponges with Sagartia elegans on tide-swept circalittoral rock A4.132 - Corynactis viridis and a mixed turf of crisiids, Bugula , Scrupocellaria , and Cellaria on moderately tide-swept exposed circalittoral rock A4.133 - Mixed turf of hydroids and large ascidians with Swiftia pallida and Caryophyllia smithii on weakly tide-swept circalittoral rock A4.134 - Flustra foliacea and colonial ascidians on tide-swept moderately wave-exposed circalittoral rock A4.1341 - Polyclinum aurantium and Flustra foliacea on sand-scoured tide-swept moderately wave-exposed circalittoral rock A4.1342 - Flustra foliacea , small solitary and colonial ascidians on tide-swept circalittoral bedrock or boulders A4.1343 - Flustra foliacea and colonial ascidians on tide-swept exposed circalittoral mixed substrata A4.135 - Sparse sponges, Nemertesia spp., and Alcyonidium diaphanum on circalittoral mixed substrata A4.136 - Suberites spp. with a mixed turf of crisiids and Bugula spp. on heavily silted moderately wave-exposed shallow circalittoral rock A4.137 - Flustra foliacea and Haliclona oculata with a rich faunal turf on tide-swept circalittoral mixed substrata A4.138 - Molgula manhattensis with a hydroid and bryozoan turf on tide-swept moderately wave-exposed circalittoral rock A4.139 - Sponges and anemones on vertical circalittoral bedrock A4.2 - Atlantic and Mediterranean moderate energy circalittoral rock A4.21 - Echinoderms and crustose communities on circalittoral rock A4.211 - Caryophyllia smithii and Swiftia pallida on circalittoral rock A4.2111 - Caryophyllia smithii , Swiftia pallida and Alcyonium glomeratum on wave-sheltered circalittoral rock A4.2112 - Caryophyllia smithii , Swiftia pallida and large solitary ascidians on exposed or moderately exposed circalittoral rock A4.212 - Caryophyllia smithii , sponges and crustose communities on wave-exposed circalittoral rock A4.2121 - Brittlestars overlying coralline crusts, Parasmittina trispinosa and Caryophyllia smithii on wave-exposed circalittoral rock A4.2122 - Caryophyllia smithii and sponges with Pentapora foliacea , Porella compressa and crustose communities on wave-exposed circalittoral rock A4.213 - Urticina felina and sand-tolerant fauna on sand-scoured or covered circalittoral rock A4.214 - Faunal and algal crusts on exposed to moderately wave-exposed circalittoral rock A4.2141 - Flustra foliacea on slightly scoured silty circalittoral rock A4.2142 - Alcyonium digitatum , Pomatoceros triqueter , algal and bryozoan crusts on wave-exposed circalittoral rock A4.2143 - Alcyonium digitatum with Securiflustra securifrons on tide-swept moderately wave-exposed circalittoral rock A4.2144 - Brittlestars on faunal and algal encrusted exposed to moderately wave-exposed circalittoral rock A4.2145 - Faunal and algal crusts with Pomatoceros triqueter and sparse Alcyonium digitatum on exposed to moderately wave-exposed circalittoral rock A4.2146 - Caryophyllia smithii with faunal and algal crusts on moderately wave-exposed circalittoral rock A4.215 - Alcyonium digitatum and faunal crust communities on vertical circalittoral bedrock A4.22 - Sabellaria reefs on circalittoral rock A4.221 - Sabellaria spinulosa encrusted circalittoral rock A4.2211 - Sabellaria spinulosa with a bryozoan turf and barnacles on silty turbid circalittoral rock A4.2212 - Sabellaria spinulosa , didemnid and small ascidians on tide-swept moderately wave-exposed circalittoral rock A4.23 - Communities on soft circalittoral rock A4.231 - Piddocks with a sparse associated fauna in sublittoral very soft chalk or clay A4.232 - Polydora sp. tubes on moderately exposed sublittoral soft rock A4.233 - Hiatella -bored vertical sublittoral limestone rock A4.24 - Mussel beds on circalittoral rock A4.241 - Mytilus edulis beds with hydroids and ascidians on tide-swept exposed to moderately wave-exposed circalittoral rock A4.242 - Musculus discors beds on moderately exposed circalittoral rock A4.25 - Circalittoral faunal communities in variable salinity A4.251 - Cushion sponges and hydroids on turbid tide-swept sheltered circalittoral rock A4.2511 - Cushion sponges, hydroids and ascidians on turbid tide-swept sheltered circalittoral rock A4.2512 - Cushion sponges and hydroids on turbid tide-swept variable salinity sheltered circalittoral rock A4.252 - Halichondria bowerbanki , Eudendrium arbusculum and Eucratea loricata on reduced salinity tide-swept circalittoral mixed substrata A4.27 - Faunal communities on deep moderate energy circalittoral rock A4.3 - Atlantic and Mediterranean low energy circalittoral rock A4.31 - Brachiopod and ascidian communities on circalittoral rock A4.311 - Solitary ascidians, including Ascidia mentula and Ciona intestinalis , on wave-sheltered circalittoral rock A4.3111 - Solitary ascidians, including Ascidia mentula and Ciona intestinalis , with Antedon spp. on wave-sheltered circalittoral rock A4.3112 - Dense brittlestars with sparse Ascidia mentula and Ciona intestinalis on sheltered circalittoral mixed substrata A4.312 - Large solitary ascidians and erect sponges on wave-sheltered circalittoral rock A4.313 - Antedon spp., solitary ascidians and fine hydroids on sheltered circalittoral rock A4.314 - Neocrania anomala and Protanthea simplex on sheltered circalittoral rock A4.3141 - Neocrania anomala and Protanthea simplex on very wave-sheltered circalittoral rock A4.3142 - Neocrania anomala , Dendrodoa grossularia and Sarcodictyon roseum on variable salinity circalittoral rock A4.33 - Faunal communities on deep low energy circalittoral rock A4.7 - Features of circalittoral rock A4.71 - Communities of circalittoral caves and overhangs A4.711 - Sponges, cup corals and anthozoans on shaded or overhanging circalittoral rock A4.72 - Circalittoral fouling faunal communities A4.721 - Alcyonium digitatum and Metridium senile on moderately wave-exposed circalittoral steel wrecks A4.722 - Ascidiella aspersa on circalittoral artificial substrata A5 - Sublittoral sediment A5.1 - Sublittoral coarse sediment A5.12 - Sublittoral coarse sediment in variable salinity (estuaries) A5.13 - Infralittoral coarse sediment A5.131 - Sparse fauna on highly mobile sublittoral shingle (cobbles and pebbles) A5.132 - Halcampa chrysanthellum and Edwardsia timida on sublittoral clean stone gravel A5.133 - Moerella spp. with venerid bivalves in infralittoral gravelly sand A5.134 - Hesionura elongata and Microphthalmus similis with other interstitial polychaetes in infralittoral mobile coarse sand A5.135 - Glycera lapidum in impoverished infralittoral mobile gravel and sand A5.136 - Cumaceans and Chaetozone setosa in infralittoral gravelly sand A5.137 - Dense Lanice conchilega and other polychaetes in tide-swept infralittoral sand and mixed gravelly sand A5.14 - Circalittoral coarse sediment A5.141 - Pomatoceros triqueter with barnacles and bryozoan crusts on unstable circalittoral cobbles and pebbles A5.142 - Mediomastus fragilis , Lumbrineris spp. and venerid bivalves in circalittoral coarse sand or gravel A5.143 - Protodorvillea kefersteini and other polychaetes in impoverished circalittoral mixed gravelly sand A5.144 - Neopentadactyla mixta in circalittoral shell gravel or coarse sand A5.145 - Branchiostoma lanceolatum in circalittoral coarse sand with shell gravel A5.15 - Deep circalittoral coarse sediment A5.151 - Glycera lapidum , Thyasira spp. and Amythasides macroglossus in offshore gravelly sand A5.152 - Hesionura elongata and Protodorvillea kefersteini in offshore coarse sand A5.2 - Sublittoral sand A5.21 - Sublittoral sand in low or reduced salinity A5.22 - Sublittoral sand in variable salinity (estuaries) A5.221 - Infralittoral mobile sand in variable salinity (estuaries) A5.222 - Nephtys cirrosa and Macoma balthica in variable salinity infralittoral mobile sand A5.223 - Neomysis integer and Gammarus spp. in fluctuating low salinity infralittoral mobile sand A5.23 - Infralittoral fine sand A5.231 - Infralittoral mobile clean sand with sparse fauna A5.232 - Sertularia cupressina and Hydrallmania falcata on tide-swept sublittoral sand with cobbles or pebbles A5.233 - Nephtys cirrosa and Bathyporeia spp. in infralittoral sand A5.234 - Semi-permanent tube-building amphipods and polychaetes in sublittoral sand A5.24 - Infralittoral muddy sand A5.241 - Echinocardium cordatum and Ensis spp. in lower shore and shallow sublittoral slightly muddy fine sand A5.242 - Fabulina fabula and Magelona mirabilis with venerid bivalves and amphipods in infralittoral compacted fine muddy sand A5.243 - Arenicola marina in infralittoral fine sand or muddy sand A5.244 - Spisula subtruncata and Nephtys hombergii in shallow muddy sand A5.25 - Circalittoral fine sand A5.251 - Echinocyamus pusillus , Ophelia borealis and Abra prismatica in circalittoral fine sand A5.252 - Abra prismatica , Bathyporeia elegans and polychaetes in circalittoral fine sand A5.26 - Circalittoral muddy sand A5.261 - Abra alba and Nucula nitidosa in circalittoral muddy sand or slightly mixed sediment A5.262 - Amphiura brachiata with Astropecten irregularis and other echinoderms in circalittoral muddy sand A5.27 - Deep circalittoral sand A5.271 - Maldanid polychaetes and Eudorellopsis deformis in deep circalittoral sand or muddy sand A5.272 - Owenia fusiformis and Amphiura filiformis in deep circalittoral sand or muddy sand A5.3 - Sublittoral mud A5.31 - Sublittoral mud in low or reduced salinity A5.32 - Sublittoral mud in variable salinity (estuaries) A5.321 - Polydora ciliata and Corophium volutator in variable salinity infralittoral firm mud or clay A5.322 - Aphelochaeta marioni and Tubificoides spp. in variable salinity infralittoral mud A5.323 - Nephtys hombergii and Tubificoides spp. in variable salinity infralittoral soft mud A5.324 - Infralittoral fluid mobile mud A5.325 - Capitella capitata and Tubificoides spp. in reduced salinity infralittoral muddy sediment A5.326 - Oligochaetes in variable or reduced salinity infralittoral muddy sediment A5.327 - Limnodrilus hoffmeisteri , Tubifex tubifex and Gammarus spp. in low salinity infralittoral muddy sediment A5.33 - Infralittoral sandy mud A5.331 - Nephtys hombergii and Macoma balthica in infralittoral sandy mud A5.332 - Sagartiogeton undatus and Ascidiella aspersa on infralittoral sandy mud A5.333 - Mysella bidentata and Abra spp. in infralittoral sandy mud A5.334 - Melinna palmata with Magelona spp. and Thyasira spp. in infralittoral sandy mud A5.335 - Ampelisca spp., Photis longicaudata and other tube-building amphipods and polychaetes in infralittoral sandy mud A5.336 - Capitella capitata in enriched sublittoral muddy sediments A5.34 - Infralittoral fine mud A5.341 - Cerastoderma edule with Abra nitida in infralittoral mud A5.342 - Arenicola marina in infralittoral mud A5.343 - Philine aperta and Virgularia mirabilis in soft stable infralittoral mud A5.344 - Ocnus planci aggregations on sheltered sublittoral muddy sediment A5.346 - Oligochaetes in mobile mud A5.35 - Circalittoral sandy mud A5.351 - Amphiura filiformis , Mysella bidentata and Abra nitida in circalittoral sandy mud A5.352 - Thyasira spp. and Nuculoma tenuis in circalittoral sandy mud A5.353 - Amphiura filiformis and Nuculoma tenuis in circalittoral and offshore muddy sand A5.354 - Virgularia mirabilis and Ophiura spp. with Pecten maximus on circalittoral sandy or shelly mud A5.3541 - Virgularia mirabilis and Ophiura spp. with Pecten maximus , hydroids and ascidians on circalittoral sandy or shelly mud with shells or stones A5.355 - Lagis koreni and Phaxas pellucidus in circalittoral sandy mud A5.36 - Circalittoral fine mud A5.361 - Seapens and burrowing megafauna in circalittoral fine mud A5.3611 - Seapens, including Funiculina quadrangularis , and burrowing megafauna in undisturbed circalittoral fine mud A5.362 - Burrowing megafauna and Maxmuelleria lankesteri in circalittoral mud A5.363 - Brissopsis lyrifera and Amphiura chiajei in circalittoral mud A5.364 - Silty sediments > 140 m with polychaetes Lumbrineris fragilis , Levinsenia gracilis and amphipods Eriopisa elongata A5.365 - Spiochaetopterus beneath high salinity Atlantic water A5.366 - Macoma calcarea in deep-water soft clayey mud A5.37 - Deep circalittoral mud A5.371 - Ampharete falcata turf with Parvicardium ovale on cohesive muddy sediment near margins of deep stratified seas A5.372 - Foraminiferans and Thyasira spp. in deep circalittoral soft mud A5.373 - Styela gelatinosa , Pseudamussium septemradiatum and solitary ascidians on sheltered deep circalittoral muddy sediment A5.374 - Capitella capitata and Thyasira spp. in organically-enriched offshore circalittoral mud and sandy mud A5.3741 - Capitella capitata , Thyasira spp. and Ophryotrocha dubia inorganically-enriched offshore circalittoral mud or sandy mud A5.375 - Levinsenia gracilis and Heteromastus filifirmis in offshore circalittoral mud and sandy mud A5.376 - Paramphinome jeffreysii , Thyasira spp. and Amphiura filiformis in offshore circalittoral sandy mud A5.377 - Myrtea spinifera and polychaetes in offshore circalittoral sandy mud A5.4 - Sublittoral mixed sediments A5.41 - Sublittoral mixed sediment in low or reduced salinity A5.42 - Sublittoral mixed sediment in variable salinity (estuaries) A5.421 - Aphelochaeta spp. and Polydora spp. in variable salinity infralittoral mixed sediment A5.422 - Crepidula fornicata and Mediomastus fragilis in variable salinity infralittoral mixed sediment A5.43 - Infralittoral mixed sediments A5.431 - Crepidula fornicata with ascidians and anemones on infralittoral coarse mixed sediment A5.432 - Sabella pavonina with sponges and anemones on infralittoral mixed sediment A5.433 - Venerupis senegalensis , Amphipholis squamata and Apseudes latreilli in infralittoral mixed sediment A5.434 - Limaria hians beds in tide-swept sublittoral muddy mixed sediment A5.435 - Ostrea edulis beds on shallow sublittoral muddy mixed sediment A5.44 - Circalittoral mixed sediments A5.441 - Cerianthus lloydii and other burrowing anemones in circalittoral muddy mixed sediment A5.4411 - Cerianthus lloydii with Nemertesia spp. and other hydroids in circalittoral muddy mixed sediment A5.442 - Sparse Modiolus modiolus , dense Cerianthus lloydii and burrowing holothurians on sheltered circalittoral stones and mixed sediment A5.443 - Mysella bidentata and Thyasira spp. in circalittoral muddy mixed sediment A5.444 - Flustra foliacea and Hydrallmania falcata on tide-swept circalittoral mixed sediment A5.445 - Ophiothrix fragilis and/or Ophiocomina nigra brittlestar beds on sublittoral mixed sediment A5.446 - Sandy mixed sediment with Alcyonidium diaphanum A5.45 - Deep circalittoral mixed sediments A5.451 - Polychaete-rich deep Venus community in offshore mixed sediments A5.5 - Sublittoral macrophyte-dominated sediment A5.51 - Maerl beds A5.511 - Phymatolithon calcareum maerl beds in infralittoral clean gravel or coarse sand A5.5111 - Phymatolithon calcareum maerl beds with red seaweeds in shallow infralittoral clean gravel or coarse sand A5.5112 - Phymatolithon calcareum maerl beds with Neopentadactyla mixta and other echinoderms in deeper infralittoral clean gravel or coarse sand A5.512 - Lithothamnion glaciale maerl beds in tide-swept variable salinity infralittoral gravel A5.513 - Lithothamnion corallioides maerl beds on infralittoral muddy gravel A5.514 - Lithophyllum fasciculatum maerl beds on infralittoral mud A5.52 - Kelp and seaweed communities on sublittoral sediment A5.521 - Laminaria saccharina and red seaweeds on infralittoral sediments A5.5211 - Red seaweeds and kelps on tide-swept mobile infralittoral cobbles and pebbles A5.5212 - Laminaria saccharina and robust red algae on infralittoral gravel and pebble A5.5213 - Laminaria saccharina and filamentous red algae on infralittoral sand A5.5214 - Laminaria saccharina with red and brown seaweeds on lower infralittoral muddy mixed sediment A5.522 - Laminaria saccharina and Chorda filum on sheltered upper infralittoral muddy sediment A5.523 - Laminaria saccharina with Psammechinus miliaris and/or Modiolus modiolus on variable salinity infralittoral sediment A5.524 - Laminaria saccharina , Gracilaria gracilis and brown seaweeds on full salinity infralittoral sediment A5.525 - Laminaria saccharina and Gracilaria gracilis with sponges and ascidians on variable salinity infralittoral sediment A5.526 - Mats of Trailliella on infralittoral muddy gravel A5.527 - Loose-lying mats of Phyllophora crispa on infralittoral muddy sediment A5.528 - Filamentous green seaweeds on low salinity infralittoral mixed sediment or rock A5.53 - Sublittoral seagrass beds A5.531 - Cymodocea beds A5.5311 - Macaronesian Cymodocea beds A5.5312 - Lusitanian Cymodocea beds A5.5321 - Canary Island Halophila beds A5.533 - Zostera beds in full salinity infralittoral sediments A5.5331 - Zostera marina /angustifolia beds on lower shore or infralittoral clean or muddy sand A5.534 - Ruppia and Zannichellia communities A5.5341 - Middle European Ruppia and Zannichellia communities A5.5343 - Ruppia maritima in reduced salinity infralittoral muddy sand A5.54 - Angiosperm communities in reduced salinity A5.541 - Vegetation of brackish waters dominated by Phragmites australis A5.542 - Association with Potamogeton pectinatus A5.545 - Zostera beds in reduced salinity infralittoral sediments A5.6 - Sublittoral biogenic reefs A5.61 - Sublittoral polychaete worm reefs on sediment A5.611 - Sabellaria spinulosa on stable circalittoral mixed sediment A5.612 - Sabellaria alveolata on variable salinity sublittoral mixed sediment A5.613 - Serpula vermicularis reefs on very sheltered circalittoral muddy sand A5.62 - Sublittoral mussel beds on sediment A5.621 - Modiolus modiolus beds with hydroids and red seaweeds on tide-swept circalittoral mixed substrata A5.622 - Modiolus modiolus beds on open coast circalittoral mixed sediment A5.623 - Modiolus modiolus beds with fine hydroids and large solitary ascidians on very sheltered circalittoral mixed substrata A5.624 - Modiolus modiolus beds with Chlamys varia , sponges, hydroids and bryozoans on slightly tide-swept very sheltered circalittoral mixed substrata A5.625 - Mytilus edulis beds on sublittoral sediment A5.626 - Hiatella arctica beds on silty clay with small pebbles and shells A5.63 - Circalittoral coral reefs A5.631 - Circalittoral Lophelia pertusa reefs A5.64 - Pontic Ostrea edulis biogenic reefs on mobile seabottom A5.641 - Deep massive Ostrea edulis reefs on bottoms of shelly gravel and boulders A5.7 - Features of sublittoral sediments A5.71 - Seeps and vents in sublittoral sediments A5.711 - Bubbling reefs in the sublittoral euphotic zone A5.7111 - Bubbling reefs in the sublittoral euphotic zone with little or no macrophyte vegetation A5.7112 - Bubbling reefs in the sublittoral euphotic zone dominated by macrophyte vegetation A5.712 - Bubbling reefs in the aphotic zone A5.713 - Freshwater seeps in sublittoral sediments A5.714 - Methane seeps in sublittoral sediments A5.715 - Oil seeps in sublittoral sediments A5.716 - Vents in sublittoral sediments A5.72 - Organically-enriched or anoxic sublittoral habitats A5.721 - Periodically and permanently anoxic sublittoral muds A5.7211 - Beggiatoa spp. on anoxic sublittoral mud A5.81 - Seeps and vents in sublittoral sediments A6 - Deep-sea bed A6.1 - Deep-sea rock and artificial hard substrata A6.11 - Deep-sea bedrock A6.12 - Deep-sea artificial hard substrata A6.13 - Deep-sea manganese nodules A6.14 - Boulders on the deep-sea bed A6.2 - Deep-sea mixed substrata A6.21 - Deep-sea lag deposits A6.22 - Deep-sea biogenic gravels (shells, coral debris) A6.23 - Deep-sea calcareous pavements A6.24 - Communities of allochthonous material A6.241 - Communities of macrophyte debris A6.3 - Deep-sea sand A6.4 - Deep-sea muddy sand A6.5 - Deep-sea mud A6.52 - Communities of abyssal muds A6.6 - Deep-sea bioherms A6.61 - Communities of deep-sea corals A6.611 - Deep-sea Lophelia pertusa reefs A6.62 - Deep-sea sponge aggregations A6.621 - Facies with Pheronema grayi A6.7 - Raised features of the deep-sea bed A6.71 - Permanently submerged flanks of oceanic islands A6.72 - Seamounts, knolls and banks A6.721 - Summit communities of seamount, knoll or bank within euphotic zone A6.722 - Summit communities of seamount, knoll or bank within the mesopelagic zone, i.e. interacting with diurnally migrating plankton A6.723 - Deep summit communities of seamount, knoll or bank (i.e. below mesopelagic zone) A6.724 - Flanks of seamount, knoll or bank A6.725 - Base of seamount, knoll or bank A6.7251 - Moat around base of seamount, knoll or bank A6.73 - Oceanic ridges A6.731 - Communities of ridge flanks A6.732 - Communities of ridge axial trough (i.e. non-vent fauna) A6.733 - Oceanic ridge without hydrothermal effects A6.74 - Abyssal hills A6.75 - Carbonate mounds A6.8 - Deep-sea trenches and canyons, channels, slope failures and slumps on the continental slope A6.81 - Canyons, channels, slope failures and slumps on the continental slope A6.811 - Active downslope channels A6.812 - Inactive downslope channels A6.813 - Alongslope channels A6.814 - Turbidites and fans A6.82 - Deep-sea trenches A6.9 - Vents, seeps, hypoxic and anoxic habitats of the deep sea A6.91 - Deep-sea reducing habitats A6.911 - Seeps in the deep-sea A6.9111 - Cold seep benthic communities of hadal zone A6.912 - Gas hydrates in deep-sea A6.913 - Cetaceans and other carcasses on the deep-sea bed A6.92 - Deep-sea bed influenced by hypoxic water column A6.93 - Isolated oceanic features influenced by hypoxic water column A6.94 - Vents in the deep sea A6.941 - Active vent fields A6.942 - Inactive vent fields B1.2 - coastal sand dunes and inland dunes B3.1 - Supralittoral rock (lichen or splash zone) B3.11 - Lichens or small green algae on supralittoral and littoral fringe rock B3.111 - Yellow and grey lichens on supralittoral rock B3.112 - Prasiola stipitata on nitrate-enriched supralittoral or littoral fringe rock B3.113 - Verrucaria maura on littoral fringe rock B3.1131 - Verrucaria maura and sparse barnacles on exposed littoral fringe rock B3.1132 - Verrucaria maura on very exposed to very sheltered upper littoral fringe rock B3.114 - Blidingia spp. on vertical littoral fringe chalk B3.115 - Ulothrix flacca and Urospora spp. on freshwater-influenced vertical littoral fringe soft rock C3.44 - Eleocharis parvula and Eleocharis acicularis beds of inland saline and brackish waters
Search the uASM