In the 1976-1986 period Pontocrates altamarinus was found to occur across the entire Belgian part of the North Sea, with the exception of the coastal zone. This distribution pattern was extended by observations in the coastal zone in the 1994-2001 period. In both periods P. altamarinus had a low distribution frequency and relatively low densities (1976-1986 period: maximum 130 ind./m2; 1994-2001 period: maximum 30 ind./m2).
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)