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Related to trout: Steelhead trout


see salmonsalmon
, member of the Salmonidae, a family of marine fish that spawn in freshwater, including the salmons, the trouts, and the chars (subfamily Salmoninae), the whitefish and the ciscoes (subfamily Coregoninae), and the grayling (subfamily Thymallinae).
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the name for freshwater fishes of the genera Salmo and Oncorhynchus, family Salmonidae. Trout live in mountain brooks and rivers or in lakes.

The brook, or river, trout usually measures up to 37 cm in length and weighs as much as 800 g, while the lake trout is larger and weighs up to 34 kg. Lake and brook trout are freshwater forms of the salmon trout. They attain sexual maturity in the third or fourth year and spawn in autumn and winter. The females deposit from 250 to several thousand roe on a gravelly bottom. The rainbow trout of North America is a freshwater form of the salmon S. gairdneri. It is more thermophilic than European trout and more resistant to diseases, and it grows more rapidly. Rainbow trout spawn in spring, summer, and autumn.

All trout are valuable commercial fishes and are bred commercially.


See references under SALMON.


(vertebrate zoology)
Any of various edible fresh-water fishes in the order Salmoniformes that are generally much smaller than the salmon.


1. any of various game fishes, esp Salmo trutta and related species, mostly of fresh water in northern regions: family Salmonidae (salmon). They resemble salmon but are smaller and spotted
2. any of various similar or related fishes, such as a sea trout
3. Austral any of various fishes of the Salmo or Oncorhynchus genera smaller than the salmon, esp European and American varieties naturalized in Australia
References in periodicals archive ?
Some trout will be stocked from the dam located near the Pennsylvania state line downstream to the bridge at Benge Road.
Presently 63 trout fish farms produce 60,000kg fish annually while work on establishment of 63 more farms is underway which will soon be completed.
FONTBURN RESERVOIR 01669 621368 / NE61 4PL A total of 70 anglers caught 168 trout in a week of varied weather and sport.
Here trout challenge our skills and throb our rods and hearts as we search for and succeed in making contact with the essence of the wild.
A recent study in a small lentic ecosystem (9) found that the rainbow trout had an average relative condition factor of 72.
Last Sunday anglers had up to four trout each, with the deep water near the valve tower yielding four fish to one angler, who also hooked and lost a couple.
Trout, both brown and the rainbow species, is a coldwater fish found aplenty in the Beas, Sutlej and Ravi rivers flowing in from the upper reaches of the Himalayan range.
The Edinburgh Trout club's efforts were rewarded with three silver medals, a cheque for pounds 300 and three top of the range reels.
From farming to processing, vertical integration promises to deliver benefits to the total trout category within all trade sectors.
The acquisition of Scot Trout & Salmon (and its earlier purchase of Silver Trout) means the Dawnfresh group now controls 85% of the trout business.
In addition to Scot Trout, Dawnfresh also acquired Scot Trout Farming (with 25 trout farms), plus the hot and cold smoking business of R&R Spink and Daniel's Sweet Herring.