Eteone longa is found in sediments with a wide range of median grain sizes: the species is only absent in very fine (< 100 µm) and very coarse sediments (> 500 µm). An optimum (relative occurrence > 20%) is reached with a median grain size of 150 to 250 µm. Eteone longa displays a preference (relative occurrence: > 40%) for relatively high mud contents (30 to 50%), but is found in sediments with other mud contents as well.
- Degraer S., J. Wittoeck, W. Appeltans, K. Cooreman, T. Deprez, H. Hillewaert, K. Hostens, J. Mees, E. Vanden Berghe & M. Vincx (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. http://www.marinespecies.org/aphia.php?p=sourcedetails&id=9234