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
      
      • MB121 : Kelp and seaweed communities on Atlantic infralittoral rock
        
      • MB122 : Seaweed or faunal communities on Atlantic infralittoral rock
        
      • MB123 : Kelp and seaweed communities on sediment-affected or disturbed Atlantic infralittoral rock
        
      • MB124 : Kelp communities on variable salinity Atlantic infralittoral rock
        
      • MB125 : Submerged fucoids, green or red seaweeds on low salinity Atlantic infralittoral rock
        
      • MB126 : Faunal communities on variable or reduced salinity Atlantic infralittoral rock
        
      • MB127 : Communities of surge gullies and caves on Atlantic infralittoral rock
        
      • MB128 : Vents and seeps in Atlantic infralittoral rock
        
    • MB13 : Baltic infralittoral rock
      
    • 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
    
    • MC31 : Arctic circalittoral coarse sediment
      
    • MC32 : Atlantic circalittoral coarse sediment
      
    • MC33 : Baltic circalittoral coarse sediment
      
    • MC34 : Black Sea circalittoral coarse sediment
      
    • MC35 : Mediterranean circalittoral coarse sediment
      
  • MC4 : Circalittoral mixed sediment
    
  • MC5 : Circalittoral sand
    
  • MC6 : Circalittoral mud
    
  • MD1 : Offshore circalittoral rock
    
    • MD11 : Arctic offshore circalittoral rock
      
    • MD12 : Atlantic offshore circalittoral rock
      
    • MD13 : Baltic offshore circalittoral rock
      
    • MD14 : Black Sea offshore circalittoral rock
      
    • MD15 : Mediterranean 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
    
    • ME51 : Arctic upper bathyal sand
      
    • ME52 : Atlantic upper bathyal sand
      
    • ME54 : Black Sea upper bathyal sand
      
    • ME55 : Mediterranean 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
    
    • MG11 : Arctic abyssal rock
      
    • MG12 : Atlantic abyssal rock
      
    • MG14 : Black Sea abyssal rock
      
    • MG15 : Mediterranean 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
    
    • 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
    
  • MH8 : Unstratified water column with full salinity
    
  • MH9 : Vertically stratified water column with full salinity
    
    • MH91 : Arctic vertically stratified water column with full salinity
      
    • MH92 : Atlantic vertically stratified water column with full salinity
      
    • MH93 : Baltic vertically stratified water column with full salinity
      
    • MH94 : Black Sea vertically stratified water column with full salinity
      
    • MH95 : Mediterranean 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