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
    
    • MA61 : Arctic littoral mud
      
    • MA62 : Atlantic littoral mud
      
    • MA63 : Baltic hydrolittoral mud
      
    • MA64 : Black Sea littoral mud
      
    • MA65 : Mediterranean 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
      
    • MB44 : Black Sea infralittoral mixed sediment
      
    • MB45 : Mediterranean infralittoral mixed sediment
      
  • MB5 : Infralittoral sand
    
  • MB6 : Infralittoral mud
    
  • MC1 : Circalittoral rock
    
  • MC2 : Circalittoral biogenic habitat
    
    • MC21 : Arctic circalittoral biogenic habitat
      
    • MC22 : Atlantic circalittoral biogenic habitat
      
    • MC23 : Baltic circalittoral biogenic habitat
      
    • MC24 : Black Sea circalittoral biogenic habitat
      
    • MC25 : Mediterranean 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
    
    • MD61 : Arctic offshore circalittoral mud
      
    • MD62 : Atlantic offshore circalittoral mud
      
    • MD63 : Baltic offshore circalittoral mud
      
      • MD631 : Baltic offshore circalittoral mud characterized by epibenthic bivalves
        
      • MD632 : Baltic offshore circalittoral mud characterized by epibenthic cnidarians
        
      • MD633 : Baltic offshore circalittoral mud characterized by epibenthic Crustaceans
        
      • MD634 : Baltic offshore circalittoral mud characterized by epibenthic epibentic polychaetes
        
        • MD6341 : Baltic offshore circalittoral mud characterized by the polychaetes Scoloplos arminger and where the substrate is predominantly clay Pontoporeia femorata and Terebellides stroemi.
          
      • MD635 : Baltic offshore circalittoral mud characterized by mixed epibenthic macrocommuntiy
        
      • MD636 : Baltic offshore circalittoral mud characterized by sparse macroscopic epibenthic biotic structures
        
      • MD637 : Baltic offshore circalittoral mud characterized by macroscopic infaunal biotic structures
        
      • MD638 : Baltic offshore circalittoral mud characterized by no macroscopic biotic structures
        
      • MD639 : Baltic offshore circalittoral soft anthropogenically created substrates
        
    • MD64 : Black Sea offshore circalittoral mud
      
    • MD65 : Mediterranean 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
    
  • MG2 : Abyssal biogenic habitat
    
  • MG3 : Abyssal coarse sediment
    
  • MG4 : Abyssal mixed sediment
    
  • MG5 : Abyssal sand
    
  • MG6 : Abyssal mud
    
• MH : Pelagic water column
  
• MJ : Ice-associated marine habitats
  
• N : Coastal habitats
  
• Q : Wetlands
  
• 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