RED LIST Biotope Expert Team
bottoms in the aphotic zone with at least 90 % coverage of muddy sediment.
The sediment must contain at least 20 % of mud, silt or clay (grain size
less than 63 µm).
range: All; Exposure range: All; Depth range: Below photic zone ‑ more common
in deeper areas.
Macoma balthica, Marenzelleria spp.
Whole Baltic Sea
2.7 Muddy bottoms
2.7.1 Aphotic zone
A5 Sublittoral sediment
A5.3 Sublittoral mud
A5.37 Deep circalittoral mud
A5.378 Baltic muddy bottoms of the aphotic zone
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