EUNIS habitat type hierarchical view (marine version 2022 & terrestrial version 2021)
The EUNIS habitat classification review is on-going. Four groups are pending review: Inland waters, Wetlands, Constructed, industrial and other artificial habitats and Complexes.-
M : Marine benthic habitats (MA-MG)
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MA1 : Littoral rock
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MA11 : Arctic littoral rock
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MA12 : Atlantic littoral rock
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MA121 : Lichens or small green algae on Atlantic supralittoral and littoral fringe rock
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MA122 : Mytilus edulis and/or barnacle communities on wave-exposed Atlantic littoral rock
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MA1221 : Mytilus edulis and barnacles on very exposed eulittoral rock
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MA1222 : Chthamalus spp. on exposed upper eulittoral rock
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MA1223 : Semibalanus balanoides on exposed to moderately exposed or vertical sheltered eulittoral rock
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![Fucus distichus [and] Fucus spiralis f. nana [on extremely exposed upper eulittoral rock](images/img_bullet.gif)
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![Himanthalia elongata [and red seaweeds on exposed lower eulittoral rock](images/img_bullet.gif)
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![[Osmundea pinnatifida] on moderately exposed mid eulittoral rock](images/img_bullet.gif)
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![[Ascophyllum nodosum], sponges and ascidians on tide-swept mid eulittoral rock](images/img_bullet.gif)
![[Fucus serratus], sponges and ascidians on tide-swept lower eulittoral rock](images/img_bullet.gif)
![Fucus serratus [with sponges, ascidians and red seaweeds on tide-swept lower eulittoral mixed substrata](images/img_bullet.gif)
![Pelvetia canaliculata [on sheltered littoral fringe rock](images/img_bullet.gif)
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![Enteromorpha [spp. on freshwater-influenced and/or unstable upper eulittoral rock](images/img_bullet.gif)
![Porphyra purpurea [or] Enteromorpha [spp. on sand-scoured mid or lower eulittoral rock](images/img_bullet.gif)
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![Arctic ephemeral fronts in reduced salinity water column](images/img_bullet.gif)
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