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
    
    • MB11 : Arctic infralittoral rock
      
    • MB12 : Atlantic infralittoral rock
      
      • MB121 : Kelp and seaweed communities on Atlantic infralittoral rock
        
      • MB122 : Seaweed or faunal communities on Atlantic infralittoral rock
        
      • MB123 : Kelp and seaweed communities on sediment-affected or disturbed Atlantic infralittoral rock
        
        • MB1231 : Saccorhiza polyschides and other opportunistic kelps on disturbed Atlantic upper infralittoral rock
          
        • MB1232 : Laminaria saccharina and/or Saccorhiza polyschides on exposed Atlantic infralittoral rock
          
        • MB1233 : Laminaria saccharina, Chorda filum and dense red seaweeds on shallow unstable Atlantic infralittoral boulders and cobbles
          
        • MB1234 : Dense Desmarestia spp. with filamentous red seaweeds on exposed Atlantic infralittoral cobbles, pebbles and bedrock
          
        • MB1235 : Mixed kelps with scour-tolerant and opportunistic foliose red seaweeds on scoured or sand-covered Atlantic infralittoral rock
          
        • MB1236 : Halidrys siliquosa and mixed kelps on tide-swept Atlantic infralittoral rock with coarse sediment
          
        • MB1237 : Polyides rotundus, Ahnfeltia plicata and Chondrus crispus on sand-covered Atlantic infralittoral rock
          
        • MB1238 : Mixed Laminaria hyperborea and Laminaria ochroleuca forest on moderately exposed or sheltered Atlantic infralittoral rock
          
        • MB1239 : Mixed Laminaria hyperborea and Laminaria saccharina on sheltered Atlantic infralittoral rock
          
        • MB123A : Laminaria saccharina on very sheltered Atlantic infralittoral rock
          
        • MB123B : Silted cape-form Laminaria hyperborea on very sheltered Atlantic infralittoral rock
          
        • MB123C : Sargassum muticum on shallow slightly tide-swept Atlantic infralittoral mixed substrata
          
      • MB124 : Kelp communities on variable salinity Atlantic infralittoral rock
        
      • MB125 : Submerged fucoids, green or red seaweeds on low salinity Atlantic infralittoral rock
        
      • MB126 : Faunal communities on variable or reduced salinity Atlantic infralittoral rock
        
      • MB127 : Communities of surge gullies and caves on Atlantic infralittoral rock
        
      • MB128 : Vents and seeps in Atlantic infralittoral rock
        
    • MB13 : Baltic infralittoral rock
      
    • MB14 : Black Sea infralittoral rock
      
    • MB15 : Mediterranean infralittoral rock
      
  • MB2 : Infralittoral biogenic habitat
    
  • MB3 : Infralittoral coarse sediment
    
  • MB4 : 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
    
  • MD1 : Offshore circalittoral rock
    
  • MD2 : Offshore circalittoral biogenic habitat
    
  • MD3 : Offshore circalittoral coarse sediment
    
  • MD4 : Offshore circalittoral mixed sediment
    
  • MD5 : Offshore circalittoral sand
    
    • MD51 : Arctic offshore circalittoral sand
      
    • MD52 : Atlantic offshore circalittoral sand
      
    • MD53 : Baltic offshore circalittoral sand
      
    • MD54 : Black Sea offshore circalittoral sand
      
    • MD55 : Mediterranean 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
  
• 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