has a clear preference for coarse sediments: a high relative occurrence (> 40%) is reached in sediments with a median grain size of 300 to 550 μm. However, the species is absent in very coarse sediments (> 600 μm). Ophelia limacina
tends to prefer sediments with low mud contents (optimum: 0 to 10%). The species does not occur in sediments with a mud content exceeding 20%.