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
      
    • MB24 : Black Sea infralittoral biogenic habitat
      
    • MB25 : Mediterranean infralittoral biogenic habitat
      
  • MB3 : Infralittoral coarse sediment
    
  • MB4 : infralittoral mixed sediment
    
  • MB5 : Infralittoral sand
    
    • MB51 : Arctic infralittoral sand
      
    • MB52 : Atlantic infralittoral sand
      
      • MB521 : Kelp and seaweed communities on Atlantic infralittoral sand
        
      • MB522 : Seagrass beds on Atlantic infralittoral sand
        
      • MB523 : Faunal communities of full salinity Atlantic infralittoral sand
        
        • MB5231 : Sparse fauna in Atlantic infralittoral mobile clean sand
          
        • MB5232 : Sertularia cupressina and Hydrallmania falcata on tide-swept Atlantic infralittoral sand with cobbles or pebbles
          
        • MB5233 : Nephtys cirrosa and Bathyporeia spp. in Atlantic infralittoral sand
          
        • MB5234 : Semi-permanent tube-building amphipods and polychaetes in Atlantic infralittoral sand
          
        • MB5235 : Echinocardium cordatum and Ensis spp. in Atlantic infralittoral slightly muddy fine sand
          
        • MB5236 : Fabulina fabula and Magelona mirabilis with venerid bivalves and amphipods in Atlantic infralittoral compacted fine muddy sand
          
        • MB5237 : Arenicola marina in Atlantic infralittoral fine sand or muddy sand
          
        • MB5238 : Spisula subtruncata and Nephtys hombergii in Atlantic infralittoral muddy sand
          
        • MB5239 : Turritella in Atlantic infralittoral Atlantic muddy sand
          
        • MB523A : Ervillia castanea beds in infralittoral Atlantic sand
          
      • MB524 : Faunal communities on variable salinity Atlantic infralittoral sand
        
    • MB53 : Baltic infralittoral sand
      
    • MB54 : Black Sea infralittoral sand
      
    • MB55 : Mediterranean infralittoral sand
      
  • MB6 : Infralittoral mud
    
    • MB61 : Arctic infralittoral mud
      
    • MB62 : Atlantic infralittoral mud
      
    • MB63 : Baltic infralittoral mud
      
    • MB64 : Black Sea infralittoral 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
    
  • 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
  
• 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