Freshwater polyps
Fig. 29: Freshwater polyps (hydra vulgaris) sitting on a twig. — Nikon D200, Nikkor AF Micro 60mm, Lake Zug, Restaurant Baumgarten, 19 May 2013 Nikon D200; Δt=1/250 s; f=60 mm; f/22.0; ISO 200; 19 May 2013 10:42:20