HELCOM RED LIST Biotope Expert Team
Baltic bottoms in the aphotic zone with at least 90 % coverage of rock, boulders or stones of more than 63 mm in diameter.
Salinity range: All; Exposure range: All; Depth range: Below photic zone ‑ more common in the shallow.
Blue mussels (Mytilus spp.), hydroids (Hydrozoa), barnacles (Balanidae)
Areas with at least 90 % coverage of rock, boulders and/or stones of more than 63 mm in diameter within the aphotic zone
Whole Baltic Sea
2.1.1 Aphotic zone
2.2.1 Aphotic zone
EUNIS 2012: A3.4 : Baltic exposed infralittoral rock A3.5 : Baltic moderately exposed infralittoral rock A3.6 : Baltic sheltered infralittoral rock
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HELCOM HUB: Technical Report on the HELCOM Underwater Biotope and habitat classification BSEP 139