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
    
    • MA21 : Arctic Littoral biogenic habitat
      
    • MA22 : Atlantic littoral biogenic habitat
      
      • MA221 : Atlantic saltmarsh driftlines
        
        • MA2211 : Atlantic saltmarsh and drift rough grass communities
          
        • MA2212 : Atlantic saltmarsh driftline annual communities
          
        • MA2213 : Elymus pycnanthus with Suaeda vera or Inula crithmoides saltmarsh driftlines
          
        • MA2214 : Elymus repens saltmarsh driftlines
          
        • MA2215 : Suaeda vera saltmarsh driftlines
          
        • MA2216 : Suaeda vera - Limonium binervosum saltmarsh driftlines
          
        • MA2217 : Spergularia marina - Puccinellia distans saltmarsh driftlines
          
        • MA2218 : Frankenia laevis - Halimione portulacoides saltmarsh driftlines
          
        • MA2219 : Inula crithmoides on saltmarshes
          
        • MA221A : Sagina maritima ephemeral salt marsh in sand
          
      • MA222 : Atlantic upper saltmarshes
        
      • MA223 : Atlantic upper-mid saltmarshes and saline and brackish reed, rush and sedge beds
        
      • MA224 : Atlantic mid-low saltmarshes
        
      • MA225 : Atlantic pioneer saltmarshes
        
      • MA226 : Sabellaria reefs in the Atlantic littoral zone
        
      • MA227 : Bivalve reefs in the Atlantic littoral zone
        
      • MA228 : Atlantic littoral Cyperaceae beds
        
    • MA23 : Baltic hydrolittoral biogenic habitat
      
      • MA231 : Baltic hydrolittoral shell gravel
        
      • MA232 : Baltic coastal meadow
        
    • MA24 : Black sea littoral biogenic habitat
      
    • MA25 : Mediterranean 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
    
    • 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
    
  • MC3 : Circalittoral coarse sediment
    
  • MC4 : Circalittoral mixed sediment
    
  • MC5 : Circalittoral sand
    
  • MC6 : Circalittoral mud
    
    • MC61 : Arctic circalittoral mud
      
    • MC62 : Atlantic circalittoral mud
      
    • MC63 : Baltic circalittoral mud
      
    • MC64 : Black Sea 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
    
  • 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
    
  • 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