A colourful fish whose sole purpose in life is to drive men wild with frustration. Now what else fits that description?

Rainbow trout are indigenous to North America and have been exported across the globe with mixed success. They have been a success in South America, New Zealand and South Africa but with very few exceptions, singularly unsuccessful in the UK. They breed in the Derbyshire Wye and, I am told, a few other places. Basically they don't like the climate and who can blame them? Rainbow trout are farmed and stocked into reservoirs (which is OK) and rivers (which is not). Introducing fish that cannot breed and are unlikely to survive the winter, into waters where they compete against the indigenous fish, is in my view disrespectful to them, the other fish and the environment. It is a disgrace and should be stopped.