Macrostomum tuba from delta of river Ter, flatworms were hidden in clusters of floating freshwater plants. Aninals were quite big [2-4 mm] with characteristic large and straight stylet.
Picture of locality http://brmlab.s0c4.net/bioosm/det/4c30b6f65b1564c75ae55ae9a563a409.htm
Sample taken from the muddy bottom of a creek. Most commonly observed organisms were a number of different types of diatom I have not been able to identify.
This organism was rare in the sample, I only spotted one.