HELCOM RED LIST Biotope Expert Team
aphotic bottoms at least 90 % coverage of hard clay. Epibenthic bivalves cover
at least 10%of the seabed and more than other perennial attached erect groups.
Out of the epibenthic bivalves, Mytilidae constitutes at least 50 % of the
is hard clay. Occur at high energy exposure areas.
Mytilus spp., Modiolus modiolus
2.3 Hard clay bottoms
2.3.1. Aphotic zone
OSPAR list of threathened biotopes:
Modiolus modiolus beds
- Habitat occurs in the OSPAR Region II (including Kattegat) and is listed threatened and/or declining in this region
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