Freshwater Polyps © Bernd Nies
Freshwater Polyps: Freshwater polyps (hydra vulgaris) on the edge on a rock. This time without current caused by the photographer. — Nikon D200, Nikkor AF Micro 60mm, 2x Sea&Sea YS-110α, Lake Lucerne, Riedsort, 25 August 2013. Nikon D200, 1/250 s, F/16.0, 60 mm, ISO 200, Sunday, August 25, 2013 18:52:13