Fig. 19: A shark has taken over that swimming island. Must be a bull shark. They are known to survive in freshwater. But that far upstream in cold water is very rare. Must be due to the climate change. 30th Reuss Swimming from Lucerne to Sins. — EXIF: Caplio GX8; Δt=1/470 s; f=17.4 mm; f/4.3; ISO 64; 2009-06-13 10:11:00
