The rainbow trout (Oncorhynchus mykiss) is a species of trout native to cold-water tributaries of the Pacific Ocean in Asia and North America. The steelhead (sometimes called steelhead trout) is an anadromous (sea-run) form of the coastal rainbow trout(O. m. irideus) or Columbia River redband trout (O. m. gairdneri) that usually returns to freshwater to spawn after living two to three years in the ocean. Freshwater forms that have been introduced into the Great Lakes and migrate into tributaries to spawn are also called steelhead.
Adult freshwater stream rainbow trout average between 0.5 and 2.5 kilograms (1 and 5 lb), while lake-dwelling and anadromous forms may reach 9 kg (20 lb). Coloration varies widely based on subspecies, forms, and habitat. Adult fish are distinguished by a broad reddish stripe along the lateral line, from gills to the tail, which is most vivid in breeding males.
Wild-caught and hatchery-reared forms of the species have been transplanted and introduced for food or sport in at least 45 countries and every continent except Antarctica. Introductions to locations outside their native range in the United States, Southern Europe, Australia, New Zealand, and South America have damaged native fish species. Introduced populations may affect native species by preying on them, out-competing them, transmitting contagious diseases (such as whirling disease), or hybridizing with closely related species and subspecies. The rainbow trout is included in the list of the top 100 globally invasive species. Other introductions into waters previously devoid of fish or with severely depleted stocks of native fish have created sport fisheries, such as the Great Lakes and Wyoming's Firehole River.
Some local populations of specific subspecies, or in the case of steelhead, distinct population segments, are listed as either threatened or endangered under the Endangered Species Act. The steelhead is the official state fish of Washington.[3]
^"Rainbow Trout". Natureserve.org. 10 May 2016. Retrieved 28 October 2021. data
^"Synonyms of Oncorhynchus mykiss (Walbaum, 1792)". Fishbase. Retrieved 2014-02-06.
^"Symbols of Washington State". Washington State Legislature. Retrieved 2013-11-29.
The rainbowtrout (Oncorhynchus mykiss) is a species of trout native to cold-water tributaries of the Pacific Ocean in Asia and North America. The steelhead...
anadromous species of trout, such as the steelhead (a coastal subspecies of rainbowtrout) and sea trout (the sea-run subspecies of brown trout), that can spend...
since 1947. The California golden trout is closely related to two rainbowtrout subspecies. The Little Kern golden trout (O. m. whitei), found in the Little...
occasionally steelhead trout, is the anadromous form of the coastal rainbowtrout (Oncorhynchus mykiss irideus) or Columbia River redband trout (O. m. gairdneri...
Oncorhynchus, it is one of the Pacific trout, a group that includes the widely distributed rainbowtrout. Cutthroat trout are popular gamefish, especially among...
subspecies of the Pacific trouts, particularly those of Oncorhynchus mykiss rainbowtrout and Oncorhynchus clarki cutthroat trout have declined in their...
The Kamloops rainbowtrout or Kamloops trout (Oncorhynchus mykiss kamloops) is a local variety of the rainbowtrout, a fish in the family Salmonidae. From...
cutthroat trout native to the western United States. In 1997, the Bonneville cutthroat was designated the official state fish of Utah, replacing the rainbow trout...
The name "silver trout" is also sometimes used for rainbowtrout. The silver trout (Salvelinus agassizii) is an extinct char species or subspecies that...
trout, the inland redband trout or the interior redband trout (Oncorhynchus mykiss gairdneri) is one of three redband trout subspecies of the rainbow...
selection and conditioning in hatcheries. Trout have been reared artificially for over 80 years. Rainbowtrout broodstocks are commonly manipulated to delay...
redband trout (Oncorhynchus mykiss stonei) is one of three redband trout subspecies of the rainbowtrout in the family Salmonidae. The trout is native...
before the beginning of the Pliocene (~5–6 mya), but also that rainbow and cutthroat trout, and Pacific salmon lineages had diverged before the beginning...
native trout (in Spanish "Truchas Mexicanas")—Mexican rainbowtrout, sometimes Baja rainbowtrout (Oncorhynchus mykiss nelsoni) and Mexican golden trout (Oncorhynchus...
brook trout is a popular game fish with anglers, particularly fly fishermen. Until it was displaced by introduced brown trout (1883) and rainbowtrout (1875)...
The Kamchatkan rainbowtrout (Oncorhynchus mykiss mykiss) is a subspecies of the rainbowtrout, which is a fish in the family Salmonidae. It is native...
at high elevation. Common coldwater fish include brook trout, rainbowtrout, and brown trout. Coolwater fish species prefer water temperature between...
The Kern River rainbowtrout (Oncorhynchus mykiss gilberti) is a localized subspecies of the rainbowtrout (Oncorhynchus mykiss), a variety of fish in...
is an interspecific fertile hybrid between a rainbowtrout (Oncorhynchus mykiss) and a cutthroat trout (O. clarkii). Cutbow hybrids may occur naturally...
was not baked well; Steph's rainbowtrout and prawn ravioli was overtaken by her burnt radicchio, and Sumeet's rainbowtrout with pomme puree had bones...
in the tank of rainbowtrout. Trout injected in the lip with a small amount of saline strongly avoided the Lego brick, however, trout injected with acetic...
The Little Kern golden trout (Oncorhynchus mykiss whitei) is a brightly colored subspecies of rainbowtrout native to the main stem and tributaries of...
namegos = "lake trout"; namegoshens = "rainbowtrout", literally meaning "little lake trout". Geneva, New York claims the title "Lake Trout Capital of the...
California rainbowtrout or San Pedro Martir trout or Nelson's trout (Oncorhynchus mykiss nelsoni) is a localized subspecies of the rainbowtrout (Oncorhynchus...
poisoning out rainbowtrout in the Goose Lake chain in the Midway Geyser Basin, park officials established a westslope cutthroat trout broodstock in Goose...
Lake trout (Oncorhynchus mykiss aquilarum) is a subspecies of rainbowtrout endemic to Eagle Lake, in Lassen County, California. It is a type of trout known...
westslope cutthroat trout (Oncorhynchus clarkii lewisi), also known as the black-spotted trout, common cutthroat trout and red-throated trout is a subspecies...
commercial and recreational purposes. Salmonids (particularly salmon and rainbowtrout), along with carp and tilapia, are the three most important fish groups...
selectively breeding rainbowtrout for three generations. A 7% increase in growth was recorded per generation for rainbowtrout by Kause et al. (2005)...
The Gila trout (Oncorhynchus gilae) is a species of salmonid, related to the rainbowtrout, native to the Southwest United States. Prior to 2006 the Gila...
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