The tiger trout is a sterile hybrid cross between a female brown trout and a male brook trout. The fish exhibits unusual markings found in neither parent. Tiger trout are rare in the wild, appearing only in areas where brook and brown trout share spawning grounds.
This interspecies cross is unusual, in part because each fish belongs to a separate genus (Salvelinus for brook trout and Salmo for browns). It happens rarely in the wild, but can be (and is) easily performed by fisheries biologists or hatchery technicians.
A typical tiger caught in the wild is between 8 and 16 inches long.
Tigers are pretty fish. The normal vermiculations (wormlike markings) found on the backs of most brookies become enlarged and often contorted into stripes (hence the name 'tiger'), swirls, spots, and rings. The trout also exhibit a greenish cast, which lets you know, when you hook one, that there is something different on the end of your line long before the fish is in hand.
http://lenharris.blogspot.com/2009/0...ger-trout.html
Tiger Trout getting some buzz
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