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
    
  • MB2 : Infralittoral biogenic habitat
    
  • MB3 : Infralittoral coarse sediment
    
  • MB4 : infralittoral mixed sediment
    
    • MB41 : Arctic infralittoral mixed sediment
      
    • MB42 : Atlantic infralittoral mixed sediment
      
    • MB43 : Baltic infralittoral mixed sediment
      
      • MB431 : Baltic infralittoral mixed sediment characterized by emergent vegetation
        
      • MB432 : Baltic infralittoral mixed sediment characterized by submerged rooted plants
        
      • MB433 : Baltic infralittoral mixed sediment characterized by perennial algae
        
      • MB434 : Baltic infralittoral mixed sediment characterized by aquatic moss
        
      • MB435 : Baltic infralittoral mixed sediment characterized by sparse epibenthic bivalves
        
        • MB4351 : Baltic infralittoral mixed sediment characterized by sparse Mytilidae
          
        • MB4352 : Baltic infralittoral mixed sediment characterized by sparse Dreissena polymorpha
          
      • MB436 : Baltic infralittoral mixed sediment characterized by epibenthic chordates
        
      • MB437 : Baltic infralittoral mixed sediment characterized by epibenthic cnidarians
        
      • MB438 : Baltic infralittoral mixed sediment characterized by epibenthic Bryozoa
        
      • MB439 : Baltic infralittoral mixed sedimen characterized by epibenthic crustacea
        
      • MB43A : Baltic infralittoral mixed sediment characterized by epibenthic sponges (Porifera)
        
      • MB43B : Baltic infralittoral mixed sediment characterized by stable aggregations of unattached perennial vegetation
        
      • MB43C : Baltic infralittoral mixed sediment characterized by soft crustose algae
        
      • MB43D : Baltic infralittoral mixed sediment characterized by annual algae
        
      • MB43E : Baltic infralittoral mixed sediment characterized by mixed epibenthic macrocommunity
        
      • MB43F : Baltic infralittoral mixed sediment characterized by microphytobenthic organisms and grazing snails
        
      • MB43G : Baltic infralittoral mixed sediment characterized by sparse epibenthic macrocommunity
        
      • MB43H : Baltic infralittoral mixed sediment characterized by no macrocommunity
        
    • MB44 : Black Sea infralittoral mixed sediment
      
    • MB45 : Mediterranean 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
    
    • MD51 : Arctic offshore circalittoral sand
      
    • MD52 : Atlantic offshore circalittoral sand
      
    • MD53 : Baltic offshore circalittoral sand
      
    • MD54 : Black Sea offshore circalittoral sand
      
    • MD55 : Mediterranean offshore circalittoral sand
      
  • MD6 : Offshore circalittoral mud
    
  • ME1 : Upper bathyal rock
    
  • ME2 : Upper bathyal biogenic habitat
    
  • ME3 : Upper bathyal coarse sediment
    
  • ME4 : Upper bathyal mixed sediment
    
  • ME5 : Upper Bathyal sand
    
  • ME6 : Upper Bathyal mud
    
    • ME61 : Arctic upper bathyal mud
      
    • ME62 : Atlantic upper bathyal mud
      
    • ME64 : Black Sea upper bathyal mud
      
    • ME65 : Mediterranean upper bathyal mud
      
  • MF1 : Lower bathyal rock
    
  • MF2 : Lower bathyal biogenic habitat
    
  • MF3 : Lower bathyal coarse sediment
    
  • MF4 : Lower bathyal mixed sediment
    
  • MF5 : 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
    
    • MH51 : Arctic unstratified water column with reduced salinity
      
    • MH52 : Atlantic unstratified water column with reduced salinity
      
    • MH53 : Baltic unstratified water column with reduced salinity
      
    • MH54 : Black Sea unstratified water column with reduced salinity
      
    • MH55 : Mediterranean 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