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)
  
• 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
    
    • MH41 : Arctic partially mixed water column with reduced salinity and medium or long residence time
      
      • MH411 : Arctic partially mixed water column with reduced salinity and medium residence time
        
      • MH412 : Arctic partially mixed water column with reduced salinity and long residence time
        
    • MH42 : Atlantic partially mixed water column with reduced salinity and medium or long residence time
      
    • MH43 : Baltic partially mixed water column with reduced salinity and medium or long residence time
      
    • MH44 : Black Sea partially mixed water column with reduced salinity and medium or long residence time
      
    • MH45 : Mediterranean partially mixed water column with reduced salinity and medium or long residence time
      
  • MH5 : Unstratified water column with reduced salinity
    
    • MH51 : Arctic unstratified water column with reduced salinity
      
    • MH52 : Atlantic unstratified water column with reduced salinity
      
      • MH521 : Atlantic euphotic (epipelagic) zone in unstratified reduced salinity water
        
      • MH522 : Atlantic mesopelagic zone in unstratified reduced salinity water
        
      • MH523 : Atlantic bathypelagic zone in unstratified reduced salinity water
        
      • MH524 : Atlantic abyssopelagic zone in unstratified reduced salinity water
        
    • MH53 : Baltic unstratified water column with reduced salinity
      
      • MH531 : Baltic euphotic (epipelagic) zone in unstratified reduced salinity water
        
      • MH532 : Baltic mesopelagic zone in unstratified reduced salinity water
        
      • MH533 : Baltic bathypelagic zone in unstratified reduced salinity water
        
      • MH534 : Baltic abyssopelagic zone in unstratified reduced salinity water
        
    • MH54 : Black Sea unstratified water column with reduced salinity
      
    • MH55 : Mediterranean 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
    
    • MH81 : Arctic unstratified water column with full salinity
      
    • MH82 : Atlantic unstratified water column with full salinity
      
    • MH83 : Baltic unstratified water column with full salinity
      
      • MH831 : Baltic euphotic (epipelagic) zone in unstratified full salinity water
        
      • MH832 : Baltic mesopelagic zone in unstratified full salinity water
        
      • MH833 : Baltic bathypelagic zone in unstratified full salinity water
        
    • MH84 : Black Sea unstratified water column with full salinity
      
    • MH85 : Mediterranean unstratified water column with full salinity
      
      • MH851 : Mediterranean euphotic (epipelagic) zone in unstratified full salinity water
        
      • MH852 : Mediterranean mesopelagic zone in unstratified full salinity water
        
      • MH853 : Mediterranean bathypelagic zone in unstratified full salinity water
        
      • MH854 : Mediterranean abyssopelagic zone in unstratified full salinity water
        
  • MH9 : Vertically stratified water column with full salinity
    
  • MHA : Fronts in full salinity water column
    
    • MHA1 : Arctic fronts in full salinity water column
      
    • MHA2 : Atlantic fronts in full salinity water column
      
    • MHA3 : Baltic fronts in full salinity water column
      
    • MHA4 : Black Sea fronts in full salinity water column
      
      • MHA41 : Black Sea ephemeral fronts in full salinity water column
        
      • MHA42 : Black Sea seasonal fronts in full salinity water column
        
      • MHA43 : Black Sea persistent fronts in full salinity water column
        
    • MHA5 : Mediterranean 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
  
  • V1 : Arable land and market gardens
    
  • V2 : Cultivated areas of gardens and parks
    
    • V21 : Large-scale ornamental garden areas
      
    • V22 : Small-scale ornamental and domestic garden areas
      
    • V23 : Recently abandoned garden areas
      
  • V3 : Artificial grasslands and herb dominated habitats
    
  • V4 : Hedgerows
    
  • V5 : Shrub plantations
    
  • V6 : Tree dominated man-made habitats