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
    
  • 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
    
    • MC61 : Arctic circalittoral mud
      
    • MC62 : Atlantic circalittoral mud
      
      • MC621 : Faunal communities of Atlantic circalittoral mud
        
        • MC6211 : Amphiura filiformis, Mysella bidentata and Abra nitida in Atlantic circalittoral sandy mud
          
        • MC6212 : Thyasira spp. and Nuculoma tenuis in Atlantic circalittoral sandy mud
          
        • MC6213 : Amphiura filiformis and Nuculoma tenuis in Atlantic circalittoral and offshore muddy sand
          
        • MC6214 : Virgularia mirabilis and Ophiura spp. With Pecten maximus on Atlantic circalittoral sandy or shelly mud
          
        • MC6215 : Lagis koreni and Phaxas pellucidus in Atlantic circalittoral sandy mud
          
        • MC6216 : Seapens and burrowing megafauna in Atlantic circalittoral fine mud
          
        • MC6217 : Burrowing megafauna and Maxmuelleria lankesteri in Atlantic circalittoral mud
          
        • MC6218 : Brissopsis lyrifera and Amphiura chiajei in Atlantic circalittoral mud
          
        • MC6219 : Beggiatoa spp. on anoxic Atlantic circalittoral mud
          
      • MC622 : Vents and seeps in Atlantic circalittoral mud
        
    • MC63 : Baltic circalittoral mud
      
    • MC64 : Black Sea circalittoral mud
      
      • MC641 : Black sea circalittoral terrigenous muds
        
      • MC642 : Communities of Marmara circalittoral muddy detritic bottoms
        
      • MC643 : Black sea upper circalittoral sandy mud
        
      • MC644 : Black sea upper circalittoral fine mud
        
      • MC645 : Black sea lower circalittoral mud
        
    • MC65 : Mediterranean 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
    
  • 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
    
    • MG51 : Arctic abyssal sand
      
    • MG52 : Atlantic abyssal sand
      
    • MG54 : Black Sea abyssal sand
      
    • MG55 : Mediterranean abyssal sand
      
  • MG6 : Abyssal mud
    
• MH : Pelagic water column
  
  • MH1 : Neuston
    
    • MH11 : Arctic neuston
      
    • MH12 : Atlantic neuston
      
    • MH13 : Baltic neuston
      
    • MH14 : Black Sea neuston
      
    • MH15 : Mediterranean 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
    
    • MH71 : Arctic fronts in reduced salinity water column
      
    • MH72 : Atlantic fronts in reduced salinity water column
      
    • MH73 : Baltic fronts in reduced salinity water column
      
    • MH74 : Black Sea fronts in reduced salinity water column
      
    • MH75 : Mediterranean 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
  
  • R1 : Dry grasslands
    
  • R2 : Mesic grasslands
    
  • R3 : Seasonally wet and wet grasslands
    
  • R4 : Alpine and subalpine grasslands
    
  • R5 : Forest fringes and clearings and tall forb stands
    
  • R6 : Inland salt steppes and salt marshes
    
  • R7 : Sparsely wooded grasslands
    
• 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