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
    
    • MB21 : Arctic infralittoral biogenic habitat
      
    • MB22 : Atlantic infralittoral biogenic habitat
      
    • MB23 : Baltic infralittoral biogenic habitat
      
      • MB231 : Baltic infralittoral bottoms dominated by epibentic bivalves
        
      • MB232 : Baltic infralittoral bottoms characterized by shell gravel
        
        • MB2321 : Baltic infralittoral shell gravel dominated by kelp
          
        • MB2322 : Baltic infralittoral biogenic shell gravel dominated by epibenthic bivalves
          
        • MB2323 : Baltic infralittoral shell gravel dominated by epibenthic chordates
          
        • MB2324 : Baltic infralittoral shell gravel dominated by mixed epibenthic macrocommunity
          
        • MB2325 : Baltic infralittoral shell gravel dominated by sparse epibenthic macrocommunity
          
        • MB2326 : Baltic infralittoral shell gravel dominated by mixed infaunal macrocommunity
          
        • MB2327 : Baltic infralittoral shell gravel dominated by mixed infaunal macrocommunity in fine sand-like shell fragments
          
        • MB2328 : Baltic infralittoral shell gravel without characteristic epibenthic communities
          
      • MB233 : Baltic infralittoral biogenic peat bottoms
        
    • MB24 : Black Sea infralittoral biogenic habitat
      
      • MB241 : Polychaete worm reefs in the Black sea infralittoral zone
        
      • MB242 : Mussel beds in the Black sea infralittoral zone
        
      • MB243 : Oyster reefs on Black sea lower infralittoral rock
        
    • MB25 : Mediterranean infralittoral biogenic habitat
      
  • MB3 : Infralittoral coarse sediment
    
  • MB4 : infralittoral mixed sediment
    
  • MB5 : Infralittoral sand
    
  • MB6 : Infralittoral mud
    
  • MC1 : Circalittoral rock
    
    • MC11 : Arctic circalittoral rock
      
    • MC12 : Atlantic circalittoral rock
      
    • MC13 : Baltic ciralittoral rock
      
    • MC14 : Black Sea circalittoral rock
      
    • MC15 : Mediterranean 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
    
  • ME5 : Upper Bathyal sand
    
  • ME6 : 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
    
• 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
  
  • V1 : Arable land and market gardens
    
  • V2 : Cultivated areas of gardens and parks
    
  • V3 : Artificial grasslands and herb dominated habitats
    
  • V4 : Hedgerows
    
  • V5 : Shrub plantations
    
  • V6 : Tree dominated man-made habitats