Tree with thick slime algae

Tree with thick slime algae: A thick layer of slime algae covered this sunken tree. The whole landscape under water looks mystical like in a fairy tale. Where's Gollum diving around, looking for his ring? — Nikon D200, Nikkor AF-S 10.5mm f/2.8 Fisheye, 2 x Sea & Sea YS-110α strobes, Lake Samaranger, Austria, 11 August 2013. Nikon D200, 1/125 s, F/5.0, 10.5 mm, ISO 200, Sunday, August 11, 2013 14:56:39