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Rainbow Trout, Oncorhynchus mykiss


Short description of Oncorhynchus mykiss, Rainbow Trout

Rainbow trout are large fish in the salmonid family; they reach up to 3.5kg, though they may be much heavier in large water bodies such as lakes. Colouration differs among habitat, region, age, sex and subspecies; colours on the top of the body include brown, green and blue, and they have a pink band running the length of the body with a silver underside. Small black spots cover the back, fins and tail.

Description of Oncorhynchus mykiss, Rainbow Trout status in GB

Rainbow trout are frequently introduced in to hatcheries in GB, and have been since the mid 1880s. There is little evidence of self-sustaining populations in GB, though a small self-sustaining population is thought to exist in the River Wye, Derbyshire.

Habitat summary: Oncorhynchus mykiss, Rainbow Trout

Rainbow trout are a coldwater fish found in cold creeks, lakes, estuaries and small to large rivers. Streams with riffles, pools, boulders and aquatic vegetation are preferred habitats.

Overview table

Environment: Freshwater
Species status: Non-Native
Native range: Russian Far East
Functional type: Predator
Status in England: Non-Native
Status in Scotland: Non-Native
Status in Wales: Non-Native
Location of first record: Delaford Park, Iver (Bucks)
Date of first record: 1888

Distribution map

Map of the UK with areas shaded to show the UK distribution of Rainbow Trout

GB Distribution from NBN Atlas

Author's name:

Esther Kettel, Ailidh Barnes

Last updated:

October 9th 2020

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