Pascal Kobeh / Rainbow trout / salmon trout (Oncorhynchus mykiss) migrating up river to spawn, Alaska, USA.

Andy Rouse / Brown trout (Salmo trutta) jumping for insects, Scotland, UK..

Andy Rouse / Osprey (Pandion Haliaetus) catching trout on a foggy morning, Scotland, UK, July.

Andy Rouse / Brown trout (Salmo trutta) jumping for insects, Scotland, UK..

Andy Rouse / Osprey (Pandion Haliaetus) splashing in water whilst hunting for trout, Scotland, UK, July.

Andy Rouse / Osprey (Pandion Haliaetus) catching trout, Scotland, UK, July.

Andy Rouse / Osprey (Pandion haliaetus) catching trout Rothiemurchus, Scotland, UK, July.

Andy Rouse / Osprey (Pandion haliaetus) catching trout at sunset, Rothiemurchus, Scotland, UK, August.

Michel Roggo / Piraputanga (Brycon hilarii) Aquario Natural, Rio Baia Bonito, Bonito area, Serra da Bodoquena (Bodoquena Mountain Range), Mato Grosso del Sul, Brazil, November. Taken for the Freshwater Project.

Erlend Haarberg / Stoat (Mustela erminea) in white winter coat, trying to steal fish (trout) hanging on transparent fishing line. Vauldalen, Sor-Trondelag, Norway, April

Graham Eaton / Salmon / Trout fish (Salmo sp) jumping a waterfall on the Afon Lledr, Betws Y Coed, Wales, October