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
      
    • MB15 : Mediterranean infralittoral rock
      
      • MB151 : Biocenosis of Mediterranean infralittoral algae
        
        • MB1511 : Overgrazing facies with incrustant algaes and sea urchins
          
        • MB1512 : Association with Cystoseira tamariscifolia and Saccorhiza polyschides
          
        • MB1513 : Association with Cystoseira amentacea (var.amentacea, var.stricta, var.spicata)
          
        • MB1514 : Facies with Mytilus galloprovincialis
          
        • MB1515 : Association with Ellisolandia elongata and Herposiphonia secunda
          
        • MB1516 : Association with Corallina officinalis
          
        • MB1517 : Association with Schottera nicaeensis
          
        • MB1518 : Association with Codium vermilara and Rhodymenia ardissonei
          
        • MB1519 : Association with Dasycladus vermicularis
          
        • MB151? : Facies and association of coralligenous biocenosis (in enclave)
          
        • MB151? : Facies with Vermetids
          
        • MB151A : Association with Alsidium helmenthochorton
          
        • MB151B : Association with Gelidium spinosum v.hystrix
          
        • MB151C : Association with Lobophora variegata
          
        • MB151D : Association with Ceramium rubrum
          
        • MB151E : Facies with Cladocora caespitosa
          
        • MB151F : Association with Cystoseira brachycarpa
          
        • MB151G : Association with Cystoseira crinita
          
        • MB151H : Association with Cystoseira crinitophylla
          
        • MB151J : Association with Cystoseira sauvageauana
          
        • MB151K : Association with Cystoseira spinosa
          
        • MB151L : Association with Sargassum vulgare
          
        • MB151M : Association with Dictyopteris polypodioides
          
        • MB151N : Association with Calpomenia sinuosa
          
        • MB151P : Association with Rhodymenia ardissonei and Rhodophyllis divaricata
          
        • MB151Q : Facies with Astroides calycularis
          
        • MB151R : Association with Flabellia petiolata and Peyssonnelia squamaria
          
        • MB151S : Association with Halymenia floresii and Halarachnion ligatatum
          
        • MB151T : Association with Peyssonnelia rubra and Peyssonnelia spp.
          
        • MB151U : Association with Halopteris scoparia
          
        • MB151V : Association with Pseudobryopsis myura and Ganonema farinosum
          
        • MB151W : Association with Cystoseira compressa
          
        • MB151X : Association with Pterocladia capillacea and Ulva laetevirens
          
        • MB151Y : Facies with large Hydrozoa
          
        • MB151Z : Association with Pterothamnion crispum and Compsothamni on thuyoides
          
      • MB152 : Biocoenosis of the Mediterranean euryhaline and/or eurythermal lagoon on 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
    
  • 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
  
• Q : Wetlands
  
• 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