As a charity MCS relies on your generous support


MCS Home

Good Fish Guide

return to search Return to search results


Click to enlarge

Trout, Rainbow

Oncorhynchus mykiss

Method of production - Farmed
Production country - UK
Production method - Freshwater ponds without recirculation
Accreditation -
Fish type - Oily fish

Sustainability rating Click for explaination of rating

This fish, caught by the methods and in the area listed above, is a good sustainable fish to eat. Click on the rating icon above to read more and on the alternatives tab below to find similar fish to eat.

Sustainability overview

Trout farming was introduced into the UK in the 1950's, and now there are over 300 trout farms. Rainbow trout is the most popular farmed species of trout, with most of production occurring in a variety of enclosures in freshwater. Farming of trout in ponds and raceways allows for greater control so there are generally fewer impacts to the surrounding environment that in open net pen production. For example the effects of effluent discharge are limited due to sedimentation and treatment practices in place. Trout are carnivorous species that are reliant on fishmeal and fish oil from wild capture fisheries to make their feed. Buying organic farmed trout is the best choice to make as fish stocking densities are generally lower in comparison to non-organic farms, feed is sourced sustainably and welfare of a high standard.


A member of the salmonid family, rainbow trout are native to western North America and range from Alaska to Mexico. They can grow up to 120cm in length and live to an average age of 11 years. They prefer freshwater and require fast flowing water to breed

Stock information

Stock area

View map areas

Stock information


We are just updating our information please check back soon.

Production method

Freshwater ponds without recirculation

Rainbow trout is the most widely farmed trout species in the UK, It is cultivated in freshwater tanks, pods and raceways adjacent to a good water supply such as a river. Water diverted into the farm in a constant flow and treated before being discharged

Read the MCS Aquaculture policy position paper

MCS Aquaculture Assessment Methodology 2012

Return to top Return to top

Sign up to get the latest marine information from the Marine Conservation Society


Sign up to get all the latest marine related news from MCS

The UK charity for the protection of our seas, shores and wildlife.

Read more about MCS

The MCS website uses 'Cookies' to enhance your web experience. Please read our data and cookie policy.
If you do not wish to use cookies please read how to disable cookies. Don't show this message again