A large brown trout.
brown trout definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a golden-brown European trout (Salmo trutta), widely stocked in North America as a game fish
brown trout definition by American Heritage Dictionary
A European freshwater game fish (Salmo trutta) that is dark olive to purple-black above and yellow-brown with reddish spots on the sides. It is naturalized in North America.