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
