Lots of hydrae
Fig. 97: Lots of hydrae sitting on a small twig at about 20 meters depth. — 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/22.0; ISO 200; 25 August 2013 19:07:07