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
    
    • MB61 : Arctic infralittoral mud
      
    • MB62 : Atlantic infralittoral mud
      
    • MB63 : Baltic infralittoral mud
      
      • MB631 : Baltic infralittoral mud characterized by emergent vegetation
        
      • MB632 : Baltic infralittoral mud sediment characterized by submerged rooted plants
        
      • MB633 : Baltic infralittoral mud sediment characterized by sparse epibenthic bivalves
        
      • MB634 : Baltic infralittoral mud characterized by epibenthic polychaetes
        
        • MB6341 : Baltic infralittoral mud dominated by tube-building polychaetes
          
      • MB635 : Baltic infralittoral mud characterized by stable aggregations of unattached perennial vegetation
        
      • MB636 : Baltic infralittoral mud characterized by annual algae
        
      • MB637 : Baltic infralittoral mud characterized by mixed epibenthic macrocommunity
        
      • MB638 : Baltic infralittoral mud characterized by infaunal bivalves
        
      • MB639 : Baltic infralittoral mud characterized by infaunal polychaetes
        
      • MB63A : Baltic infralittoral mud characterized by infaunal crustacea
        
      • MB63B : Baltic infralittoral mud characterized by infaunal echinoderms
        
      • MB63C : Baltic infralittoral mud characterized by infaunal insect larvae
        
      • MB63D : Baltic infralittoral mud without characteristic macroscopic communities
        
      • MB63E : Baltic infralittoral soft anthropogenically created substrates
        
    • MB64 : Black Sea infralittoral mud
      
      • MB641 : Black sea infralittoral fine mud
        
      • MB642 : Black sea infralittoral terrigenous muds
        
      • MB643 : Communities of Marmara infralittoral coastal terrigenous muds
        
      • MB644 : Communities of Marmara infralittoral estuarine mud
        
    • MB65 : Mediterranean 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
    
  • ME3 : Upper bathyal coarse sediment
    
    • ME31 : Arctic upper bathyal coarse sediment
      
    • ME32 : Atlantic upper bathyal coarse sediment
      
    • ME34 : Black Sea upper bathyal coarse sediment
      
    • ME35 : Mediterranean 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
    
    • MF31 : Arctic lower bathyal coarse sediment
      
    • MF32 : Atlantic lower bathyal coarse sediment
      
    • MF34 : Black Sea lower bathyal coarse sediment
      
    • MF35 : Mediterranean 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
    
    • MH61 : Arctic vertically stratified water column with reduced salinity
      
    • MH62 : Atlantic vertically stratified water column with reduced salinity
      
    • MH63 : Baltic vertically stratified water column with reduced salinity
      
    • MH64 : Black Sea vertically stratified water column with reduced salinity
      
    • MH65 : Mediterranean 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
  
  • N1 : Coastal dunes and sandy shores
    
  • N2 : Coastal shingle
    
  • N3 : Rock cliffs, ledges and shores, including the supralittoral
    
• 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