Black sea lower circalittoral mud

Terrigenous muds (mud of terrestrial origin), calcareous muds and biogenic detritic bottoms at depths of 60-180m. The benthic fauna is dominated by bean mussels Modiolula phaseolina, polychaetes and solitary ascidians. At the greatest depths the environment becomes hypoxic. Here the sediment consists of periazoic calcareous white muds and faunal communities become impoverished. Characteristic species:Modiolula phaseolina, Amphiura stepanovi, Terebellides stroemi, Pachycerianthus solitarius, solitary ascidians (Ascidiella aspersa, Ciona intestinalis, Eugyra), hydrozoans (Bougainvillia ramosa), nematodes and oligochaetes.

Código Eunis 2021: MC645