Michel Roggo / Marble trout (Salmo trutta marmorata) morph of the Brown Trout, female at spawning ground, Tolminka river, Slovenia, 2005

Michel Roggo / Lake trout (Salmo trutta lacustris) morph of Brown Trout, jumping up waterfall on migration to spawning ground, Lac de Neuchtel, Switzerland 2006

Kim Taylor / Brown trout (Salmo trutta) leaping for a damselfly. (digitally enhanced)

Barry Bland / Rainbow Trout {Salmo gairdneri} Fly Fishing on the Clutha River, Wanaka, New Zealand. Model Released.

Cheryl-Samantha Owen / Rainbow trout (Oncorhynchus mykiss) caught in net as part of an eradication program, Krom River, Cedarberg Mountains, Western Cape, South Africa. A species introduced to the Krom River for angling pur...

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

Jussi Murtosaari / Rainbow trout (Oncorhynchus mykiss) invasive species, native to cold-water tributaries of Pacific Ocean in Asia and North America. Taken in aquarium, central Finland, May.

Andy Trowbridge / Fly fisherman (Paul van Klink) 'sight' fishing to brown trout (Salmo trutta) in a gin clear 'backcountry' river, Ugly River, Kahurangi National Park, Buller District, South Island, New Zealand. Decemb...

Alex Mustard / 2020VISION / Brown trout (Salmo trutta) swimming through sun beams in a freshwater lake, Capernwray Quarry, Lancashire, UK, July

Nature Production / American black bear (Ursus americanus) carrying trout in mouth, Alaska, USA, August

Wild Wonders of Europe / Falklin / Brown trout (Salmo trutta) hunting Mayfly (Ephemera Danica) Dala river, Gtene, Vstra Gtaland, Sweden, May 2009

Andy Trowbridge / Brown trout (Salmo trutta) with artificial dry fly ( Parachute Adams) in corner of mouth. North Canterbury, South Island, New Zealand. January.