Atylus swammerdami displays no clear preference for sediments with a specific grain size: the species is found in sediments with median grain sizes up to 550 μm with a low relative occurrence. However, a clear preference can be seen with regard to the mud content. Atylus swammerdami reaches a relative occurrence of over 40% in sediments with a mud content of 30-40%. The species is nevertheless also found in sediments with lower or higher mud contents (up to 50%).
Degraer, S.; Wittoeck, J.; Appeltans, W.; Cooreman, K.; Deprez, T.; Hillewaert, H.; Hostens, K.; Mees, J.; Vanden Berghe, E.; Vincx, M. (2006). The macrobenthos atlas of the Belgian part of the North Sea. Belgian Science Policy. D/2005/1191/3. ISBN 90-810081-6-1. 164 pp. (look up in IMIS)