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. Sessile/semi-sessile epibenthic fauna is present but covers less than 10 % of the seabed.
Substrate is rock and boulders. Depth is typically from approximately 20 meters and deeper.
Mytilus spp. Bryozoa, Balanidae, Bryozoa, Porifera, Hydrozoa
Diversity, abundance and biomass of fauna.
Whole Baltic Sea
2.1 Rocky bottoms
2.1.1 Aphotic zone
2.2 Stony bottoms
2.2.1 Aphotic zone
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