An elongated, cylindrical body up to 55mm long with a small, spherical head surrounded by long tentacles. The first segments are directed forward and bear long hair-like bristles. The shape of the parapodial flaps depends on their location on the body. The colour ranges from red (anterior end) over dark green to black with white patches (posterior end). Digs U-shaped burrows.
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)