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
      
    • MB13 : Baltic infralittoral rock
      
    • MB14 : Black Sea infralittoral rock
      
      • MB141 : Invertebrate dominated Black sea lower infralittoral rock
        
      • MB142 : Exposed Black sea upper infralittoral rock with turf of Corallinales
        
      • MB143 : Mytilid dominated Black sea exposed upper infralittoral rock with foliose algae (no fucales)
        
      • MB144 : Mytilid dominated Black sea exposed upper infralittoral rock with Fucales
        
      • MB145 : Foliose algae, other than fucales on Black sea sheltered upper infralittoral rock
        
      • MB146 : Black sea exposed upper infralittoral rock with rock borers
        
      • MB147 : Corallinales on moderately exposed Black sea upper infralittoral rock
        
      • MB148 : Mytilid dominated Black sea moderately exposed upper infralittoral rock with foliose algae (other than fucales)
        
      • MB149 : Mytilid dominated Black sea moderately exposed upper infralittoral rock with fucales
        
      • MB14A : Fucales and other algae on Black sea sheltered upper infralittoral rock, well illuminated
        
      • MB14B : Black Sea sheltered, shaded upper infralittoral rock, with sciaphilic algae
        
      • MB14C : Black Sea lower infralittoral rock, with significant cover of sciaphilic algae
        
      • MB14D : Black sea barren lower infralittoral rock
        
      • MB14E : Caves, overhangs and surge gullys in Black sea infralittoral rock
        
      • MB14F : Invertebrate-dominated sunken timber in the Black Sea infralittoral
        
    • MB15 : Mediterranean infralittoral rock
      
  • MB2 : Infralittoral biogenic habitat
    
    • MB21 : Arctic infralittoral biogenic habitat
      
    • MB22 : Atlantic infralittoral biogenic habitat
      
      • MB221 : Worm reefs in the Atlantic infralittoral zone
        
      • MB222 : Bivalve reefs in the Atlantic infralittoral zone
        
    • 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
    
  • 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
    
  • MD6 : Offshore circalittoral mud
    
  • ME1 : Upper bathyal rock
    
  • ME2 : Upper bathyal biogenic habitat
    
  • ME3 : Upper bathyal coarse sediment
    
    • ME31 : Arctic upper bathyal coarse sediment
      
    • ME32 : Atlantic upper bathyal coarse sediment
      
    • ME34 : Black Sea upper bathyal coarse sediment
      
    • ME35 : Mediterranean upper bathyal coarse sediment
      
  • ME4 : Upper bathyal mixed sediment
    
    • ME41 : Arctic upper bathyal mixed sediment
      
    • ME42 : Atlantic upper bathyal mixed sediment
      
    • ME44 : Black Sea upper bathyal mixed sediment
      
    • ME45 : Mediterranean 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
    
    • MG21 : Arctic abyssal biogenic habitat
      
    • MG22 : Atlantic abyssal biogenic habitat
      
    • MG24 : Black Sea abyssal biogenic habitat
      
    • MG25 : Mediterranean 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
    
    • MH61 : Arctic vertically stratified water column with reduced salinity
      
    • MH62 : Atlantic vertically stratified water column with reduced salinity
      
    • MH63 : Baltic vertically stratified water column with reduced salinity
      
    • MH64 : Black Sea vertically stratified water column with reduced salinity
      
      • MH641 : Black Sea water column with ephemeral thermal stratification and reduced salinity
        
      • MH642 : Black Sea water column with seasonal thermal stratification and reduced salinity
        
      • MH643 : Black Sea water column with permanent thermal stratification and reduced salinity
        
      • MH644 : Black Sea water column with ephemeral halocline and reduced salinity
        
      • MH645 : Black Sea water column with seasonal halocline and reduced salinity
        
      • MH646 : Black Sea water column with permanent halocline and reduced salinity
        
      • MH647 : Black Sea water column with ephemeral oxygen stratification and reduced salinity
        
      • MH648 : Black Sea water column with seasonal oxygen stratification and reduced salinity
        
      • MH649 : Black Sea water column with permanent oxygen stratification and reduced salinity
        
    • MH65 : Mediterranean 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
  
• 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