Note decomposing carcass in third photo
Fast flowing brook, found together with Dugesia gonocephala
Picture of locality http://brmlab.s0c4.net/bioosm/det/4e497b6352ac6bf4f569cd389ec7c5a9.htm
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