The Rhine river has its source in canton Grisons, fills Lake Constance and ends in the North Sea. Popular diving sites are the old Rhine at Diepoldsau and the customs bridge at Rheinau. Although one usually encounters eels in this river, this species is unfortunately going to extinct. The eels have to travel from the european rivers across the Atlantic ocean to the Sargasso sea for breeding. But between Lake Constance and Basel there are already eleven hydraulic power stations and in each of those about one third dies in the turbines. So almost no eel has ever a chance to reproduce.
Fig. 1: Looks like an underwater salad but it's a water lily that has no blossom yet. Old Rhine, Diepoldsau — EXIF: Nikon D200; Δt=1/91 s; f=12 mm; f/6.3; ISO 100; 2007-04-28 15:38:09
Fig. 2: A small group of tenches. Old Rhine, Diepoldsau — EXIF: Nikon D200; Δt=1/60 s; f=24 mm; f/5.0; ISO 100; 2007-04-28 16:00:48
Fig. 3: Northern pike (Esox lucius). Customs Bridge, Rheinau — EXIF: Nikon D200; Δt=1/250 s; f=24 mm; f/5.6; ISO 200; 2013-08-30 20:18:56
Fig. 4: Sweetwater sponge. Customs Bridge, Rheinau — EXIF: Nikon D200; Δt=1/250 s; f=24 mm; f/5.6; ISO 200; 2013-08-30 20:23:58
Fig. 5: European eel (Anguilla anguilla). Customs Bridge, Rheinau — EXIF: Nikon D200; Δt=1/250 s; f=24 mm; f/8.0; ISO 200; 2013-08-30 20:31:30
Fig. 6: Common roach (Rutilus rutilus). Customs Bridge, Rheinau — EXIF: Nikon D200; Δt=1/250 s; f=24 mm; f/8.0; ISO 200; 2013-08-30 20:34:12
Fig. 7: Diving in river Rhine. Mein Blitz war wohl heller als die Lampe. Customs Bridge, Rheinau — EXIF: Nikon D200; Δt=1/250 s; f=24 mm; f/6.7; ISO 200; 2013-08-30 20:41:52
Fig. 8: Northern pike (Esox lucius). Customs Bridge, Rheinau — EXIF: Nikon D200; Δt=1/250 s; f=24 mm; f/5.6; ISO 200; 2013-08-30 20:56:45
Fig. 9: European eel (Anguilla anguilla). Customs Bridge, Rheinau — EXIF: Nikon D200; Δt=1/250 s; f=24 mm; f/8.0; ISO 200; 2013-08-30 21:15:45
Fig. 10: European eel (Anguilla anguilla). Customs Bridge, Rheinau — EXIF: Nikon D200; Δt=1/250 s; f=24 mm; f/8.0; ISO 200; 2013-08-30 21:35:51
Fig. 11: European eel (Anguilla anguilla). Customs Bridge, Rheinau — EXIF: Nikon D200; Δt=1/250 s; f=24 mm; f/8.0; ISO 200; 2013-08-30 21:37:13
Fig. 12: One of the two catfish that swam by above our heads. Had to crop the image a bit, because it was still too far away for the 20mm wideangle lens. River Rhine at Zollbrücke Rheinau — EXIF: Nikon D200; Δt=1/125 s; f=20 mm; f/3.2; ISO 100; 2018-04-07 10:08:58
Fig. 13: One of the two catfish that swam by above our heads. Had to crop the image a bit, because it was still too far away for the 20mm wideangle lens. River Rhine at Zollbrücke Rheinau — EXIF: Nikon D200; Δt=1/125 s; f=20 mm; f/2.8; ISO 100; 2018-04-07 10:09:22
Fig. 14: One of the two catfish we met. Unfortunately it turned around before crossing the sun. River Rhine at Zollbrücke Rheinau — EXIF: Nikon D200; Δt=1/125 s; f=20 mm; f/16.0; ISO 100; 2018-04-07 10:10:41
Fig. 15: The water here is only five meters deep but the bridge and the sun are producing pretty light and shadows. — EXIF: Nikon D200; Δt=1/125 s; f=20 mm; f/9.0; ISO 100; 2018-04-07 10:18:43
Fig. 16: A bunch of young fishes are trying to hide nearby a patch of sea grass. River Rhine at Zollbrücke Rheinau — EXIF: Nikon D200; Δt=1/125 s; f=20 mm; f/2.8; ISO 100; 2018-04-07 10:30:02
Fig. 17: It was his first dive in the river Rhine at Zollbrücke Rheinau. I think he liked it. — EXIF: Nikon D200; Δt=1/125 s; f=20 mm; f/2.8; ISO 100; 2018-04-07 10:48:03
Fig. 18: Below the water surface nearby the shore. River Rhine at Zollbrücke Rheinau — EXIF: Nikon D200; Δt=1/125 s; f=20 mm; f/8.0; ISO 100; 2018-04-07 10:51:51
