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)
  
  • MA1 : Littoral rock
    
  • MA2 : Littoral biogenic habitat
    
  • MA3 : Littoral coarse sediment
    
  • MA4 : Littoral mixed sediment
    
  • MA5 : Littoral sand
    
  • MA6 : Littoral mud
    
  • MB1 : Infralittoral rock
    
    • MB11 : Arctic infralittoral rock
      
    • MB12 : Atlantic infralittoral rock
      
    • MB13 : Baltic infralittoral rock
      
      • MB131 : Perennial algae on Baltic infralittoral rock and boulders
        
        • MB1311 : Baltic infralittoral rock and boulders dominated by Fucus spp
          
        • MB1312 : Baltic infralittoral rock and boulders dominated by perennial non-filamentous corticated red algae
          
        • MB1313 : Baltic infralittoral rock and boulders dominated by perennial foliose red algae
          
        • MB1314 : Baltic infralittoral rock and boulders dominated by kelp
          
        • MB1315 : Baltic infralittoral rock and boulders dominated by perennial filamentous algae
          
      • MB132 : Baltic infralittoral rock and boulders dominated by aquatic moss
        
      • MB133 : Baltic infralittoral rock and boulders characterized by sparse epibentic bivalves
        
      • MB134 : Baltic infralittoral rock and boulders characterized by epibenthic chordates
        
      • MB135 : Baltic infralittoral rock and boulders characterized by epibenthic cnidarians
        
      • MB136 : Baltic infralittoral rock and boulders characterized by epibenthic Bryozoa
        
      • MB137 : Baltic infralittoral rock and boulders characterized by epibenthic crustacea
        
      • MB138 : Baltic infralittoral rock and boulders characterized by epibenthic sponges
        
      • MB139 : Baltic infralittoral rock and boulders characterized by soft crustose algae
        
      • MB13A : Baltic infralittoral rock and boulders characterized by annual algae
        
      • MB13B : Baltic infralittoral rock and boulders characterized by mixed epibenthic macrocommunity
        
      • MB13C : Baltic infralittoral rock and boulders characterized by microphytobenthic organisms and grazing snails
        
      • MB13D : Baltic infralittoral rock and boulders characterized by sparse epibenthic macrocommunity
        
      • MB13E : Baltic infralittoral rock and boulders characterized by no macrocommunity
        
      • MB13F : Baltic infralittoral hard clay characterized by sparse epibenthic bivalves
        
      • MB13G : Baltic infralittoral hard clay characterized by mixed epibenthic macrocommunity
        
      • MB13H : Baltic infralittoral hard clay characterized by sparse epibenthic macrocommunity
        
      • MB13J : Baltic infralittoral hard clay characterized by no macrocommunity
        
      • MB13K : Baltic infralittoral rock characterized by marl (marlstone rock)
        
      • MB13L : Baltic infralittoral hard bottoms characterized by ferromanganese concretion
        
      • MB13M : Baltic infralittoral hard anthropogenically created substrates
        
    • MB14 : Black Sea infralittoral rock
      
    • MB15 : Mediterranean infralittoral rock
      
  • MB2 : Infralittoral biogenic habitat
    
  • MB3 : Infralittoral coarse sediment
    
  • MB4 : infralittoral mixed sediment
    
  • MB5 : Infralittoral sand
    
  • MB6 : Infralittoral mud
    
  • MC1 : Circalittoral rock
    
  • MC2 : Circalittoral biogenic habitat
    
  • MC3 : Circalittoral coarse sediment
    
  • MC4 : Circalittoral mixed sediment
    
  • MC5 : Circalittoral sand
    
  • MC6 : Circalittoral mud
    
  • MD1 : Offshore circalittoral rock
    
  • MD2 : Offshore circalittoral biogenic habitat
    
  • MD3 : Offshore circalittoral coarse sediment
    
  • MD4 : Offshore circalittoral mixed sediment
    
  • MD5 : Offshore circalittoral sand
    
  • MD6 : Offshore circalittoral mud
    
  • ME1 : Upper bathyal rock
    
  • ME2 : Upper bathyal biogenic habitat
    
    • ME21 : Arctic upper bathyal biogenic habitat
      
    • ME22 : Atlantic upper bathyal biogenic habitat
      
    • ME24 : Black Sea upper bathyal biogenic habitat
      
    • ME25 : Mediterranean Upper bathyal biogenic habitat
      
  • ME3 : Upper bathyal coarse sediment
    
  • ME4 : Upper bathyal mixed sediment
    
    • ME41 : Arctic upper bathyal mixed sediment
      
    • ME42 : Atlantic upper bathyal mixed sediment
      
    • ME44 : Black Sea upper bathyal mixed sediment
      
    • ME45 : Mediterranean upper bathyal mixed sediment
      
  • ME5 : Upper Bathyal sand
    
  • ME6 : Upper Bathyal mud
    
  • MF1 : Lower bathyal rock
    
  • MF2 : Lower bathyal biogenic habitat
    
    • MF21 : Arctic lower bathyal biogenic habitat
      
    • MF22 : Atlantic lower bathyal biogenic habitat
      
    • MF24 : Black Sea lower bathyal biogenic habitat
      
    • MF25 : Mediterranean lower bathyal biogenic habitat
      
  • MF3 : Lower bathyal coarse sediment
    
  • MF4 : Lower bathyal mixed sediment
    
  • MF5 : Lower bathyal sand
    
    • MF51 : Arctic lower bathyal sand
      
    • MF52 : Atlantic lower bathyal sand
      
    • MF54 : Black Sea lower bathyal sand
      
    • MF55 : Mediterranean lower bathyal sand
      
  • MF6 : Lower bathyal mud
    
  • MG1 : Abyssal rock
    
  • MG2 : Abyssal biogenic habitat
    
  • MG3 : Abyssal coarse sediment
    
  • MG4 : Abyssal mixed sediment
    
  • MG5 : Abyssal sand
    
  • MG6 : Abyssal mud
    
    • MG61 : Arctic abyssal mud
      
    • MG62 : Atlantic abyssal mud
      
    • MG64 : Black Sea abyssal mud
      
    • MG65 : Mediterranean abyssal mud
      
• MH : Pelagic water column
  
  • MH1 : Neuston
    
  • MH2 : Completely mixed water column with reduced salinity
    
  • MH3 : Completely mixed water column with full salinity
    
  • MH4 : Partially mixed water column with reduced salinity and medium or long residence time
    
  • MH5 : Unstratified water column with reduced salinity
    
  • MH6 : Vertically stratified water column with reduced salinity
    
  • MH7 : Fronts in reduced salinity water column
    
  • MH8 : Unstratified water column with full salinity
    
  • MH9 : Vertically stratified water column with full salinity
    
  • MHA : Fronts in full salinity water column
    
• MJ : Ice-associated marine habitats
  
• N : Coastal habitats
  
• R : Grasslands and lands dominated by forbs, mosses or lichens
  
• S : Heathland, scrub and tundra
  
• T : Forest and other wooded land
  
• U : Inland habitats with no or little soil and mostly with sparse vegetation
  
• V : Vegetated man-made habitats