Freshwater organisms (bryozoans ?) photographed March 14, 2013 in a shallow water 20-30 cm in a dimly lit cavity of northern France (entrance to a water seal, in water at low current probably protected from frost). I do not know where this water comes from, and where it goes. The light that allowed the photo is artificial, but the colors are quite faithful to reality (a little too yellow for yellow, and too blue for the blue). The cavity is dark, but in the morning and at noon, a little light penetrates even when there. The water seems eutrophic, and there are branches and dead leaves around the stone that carries these organisms