EUNIS habitat type hierarchical view

• A : Marine habitats
  
  • A1 : Littoral rock and other hard substrata
    
  • A2 : Littoral sediment
    
  • A3 : Infralittoral rock and other hard substrata
    
  • A4 : Circalittoral rock and other hard substrata
    
  • A5 : Sublittoral sediment
    
  • A6 : Deep-sea bed
    
    • A6.1 : Deep-sea rock and artificial hard substrata
    • A6.2 : Deep-sea mixed substrata
    • A6.3 : Deep-sea sand
    •  A6.4 : Deep-sea muddy sand
    • A6.5 : Deep-sea mud
    • A6.6 : Deep-sea bioherms
    • A6.7 : Raised features of the deep-sea bed
    • A6.8 : Deep-sea trenches and canyons, channels, slope failures and slumps on the continental slope
    • A6.9 : Vents, seeps, hypoxic and anoxic habitats of the deep sea
  • A7 : Pelagic water column
    
    • A7.1 : Neuston
    • A7.2 : Completely mixed water column with reduced salinity
    • A7.3 : Completely mixed water column with full salinity
      •  A7.31 : Completely mixed water column with full salinity and short residence time
      •  A7.32 : Completely mixed water column with full salinity and medium residence time
      •  A7.33 : Completely mixed water column with full salinity and long residence time
    • A7.4 : Partially mixed water column with reduced salinity and medium or long residence time
    • A7.5 : Unstratified water column with reduced salinity
    • A7.6 : Vertically stratified water column with reduced salinity
    • A7.7 : Fronts in reduced salinity water column
    • A7.8 : Unstratified water column with full salinity
    • A7.9 : Vertically stratified water column with full salinity
    • A7.A : Fronts in full salinity water column
  • A8 : Ice-associated marine habitats
    
• B : Coastal habitats
  
• C : Inland surface waters
  
  • C1 : Surface standing waters
    
  • C2 : Surface running waters
    
  • C3 : Littoral zone of inland surface waterbodies
    
    • C3.1 : Species-rich helophyte beds
    • C3.2 : Water-fringing reedbeds and tall helophytes other than canes
    • C3.3 : Water-fringing beds of tall canes
    • C3.4 : Species-poor beds of low-growing water-fringing or amphibious vegetation
    • C3.5 : Periodically inundated shores with pioneer and ephemeral vegetation
    • C3.6 : Unvegetated or sparsely vegetated shores with soft or mobile sediments
    • C3.7 : Unvegetated or sparsely vegetated shores with non-mobile substrates
    •  C3.8 : Inland spray- and steam-dependent habitats
• D : Mires, bogs and fens
  
• E : Grasslands and lands dominated by forbs, mosses or lichens
  
• F : Heathland, scrub and tundra
  
• G : Woodland, forest and other wooded land
  
• H : Inland unvegetated or sparsely vegetated habitats
  
• I : Regularly or recently cultivated agricultural, horticultural and domestic habitats
  
• J : Constructed, industrial and other artificial habitats
  
• X : Habitat complexes