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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MA2 : Littoral biogenic habitat
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MA3 : Littoral coarse sediment
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MA4 : Littoral mixed sediment
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MA5 : Littoral sand
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MA6 : Littoral mud
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MB1 : Infralittoral rock
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MB2 : Infralittoral biogenic habitat
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MB3 : Infralittoral coarse sediment
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MB4 : infralittoral mixed sediment
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MB5 : Infralittoral sand
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MB6 : Infralittoral mud
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MC1 : Circalittoral rock
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MC11 : Arctic circalittoral rock
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MC12 : Atlantic circalittoral rock
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MC13 : Baltic ciralittoral rock
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MC131 : Baltic ciralittoral rock and boulders characterized by sparse epibenthic bivalves
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MC132 : Baltic ciralittoral rock and boulders characterized by epibenthic chordates
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MC133 : Baltic ciralittoral rock and boulders characterized by epibenthic cnidarians
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MC1331 : Baltic ciralittoral rock and boulders dominated hydroids (Hydrozoa)
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MC1332 : Baltic ciralittoral rock and boulders dominated by sea anemones (Actiniarida)
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MC1333 : Baltic ciralittoral rock and boulders dominated by soft corals (Alcyonacea)
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![Baltic ciralittoral rock and boulders characterized by epibenthic sponges](images/img_bullet.gif)
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![Baltic ciralittoral hard bottoms characterized by marl (marlstone rock)](images/img_bullet.gif)
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![Modiolus modiolus [beds with hydroids and red seaweeds on tide-swept Atlantic circalittoral mixed substrata](images/img_bullet.gif)
![Modiolus modiolus [beds on open coast Atlantic circalittoral mixed sediment](images/img_bullet.gif)
![Modiolus modiolus [beds with fine hydroids and large solitary ascidians on very sheltered Atlantic circalittoral mixed substrata](images/img_bullet.gif)
![Modiolus modiolus [beds with] Chlamys varia[, sponges, hydroids and bryozoans on slightly tide-swept very sheltered Atlantic circalittoral mixed substrata](images/img_bullet.gif)
![Mytilus edulis [beds on Atlantic circalittoral sediment](images/img_bullet.gif)
![Hiatella arctica [beds on Atlantic circalittoral silty clay with small pebbles and shells](images/img_bullet.gif)
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![Arctic offshore circalittoral coarse sediment](images/img_bullet.gif)
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![Black Sea offshore circalittoral coarse sediment](images/img_bullet.gif)
![Mediterranean offshore circalittoral coarse sediment](images/img_bullet.gif)
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![Arctic lower bathyal biogenic habitat](images/img_bullet.gif)
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![Black Sea lower bathyal biogenic habitat](images/img_bullet.gif)
![Mediterranean lower bathyal biogenic habitat](images/img_bullet.gif)
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![Black Sea abyssal mud](images/img_bullet.gif)
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