Fig. 21: The larva of a Caddisfly (lat. Trichoptera) is living under water and builds a tube from various little pieces that it finds. It uses it for hiding and protection. Unfortunately there was nothing more interesting on this dive site at river Aare near the open air swimming pool at Brugg. The maximum depth there is about four meters. Dive #645: Swimming bath Brugg, Aare. — EXIF: Nikon D200; Δt=1/250 s; f=105 mm; f/18.0; ISO 400; 2018-05-04 9:40:56
