The £2 billion salmon farming industry marketed around the world as Scottish is virtually all owned by investors in Norway, Switzerland, Cyprus, Canada and other countries.
Supermarkets are selling farmed salmon from companies accused of poor animal welfare, The Ferret can reveal.
Salmon farmers with the worst records on animal welfare have been named and shamed by campaigners hoping to provoke reforms.
The diseases, damage and infestations suffered by hundreds of thousands of caged salmon in Scotland have been exposed by more than 300 photos released by the Scottish Government.
At least 45 lochs around Scotland’s coast have been contaminated by toxic pesticides from fish farms that can harm wildlife and human health.