Fig. 95: 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; Δt=1/250 s; f=60 mm; f/16.0; ISO 200; 25 August 2013 18:52:13
