Wild swimmers face “a risk” to their health from a toxic pesticide used by salmon farming companies, says a report for the industry.
The use of drugs at fish farms in Scotland has risen more than 50 times over the last six years.
The company that supplies Scottish farmed salmon to the retail giant, Marks and Spencer, has been officially reprimanded for misreporting toxic pesticide use.
A leading Scottish salmon producer hired a private investigator to snoop on a key critic of the fish farming industry, internal industry documents reveal.
Fish farming provides jobs on Skye, but some locals are concerned about its environmental impacts.
Nearly half of Scotland's salmon farms burn, dump or destroy millions of dead fish every year.
Six fish farming companies in Scotland given government handouts of over £10 million have made profits of £926 million since 2010.
The Scottish Government has reprimanded salmon farming companies for breaking the rules on shooting seals - but has not taken any further action.
The Scottish salmon farming industry has incurred “hidden” costs of £3.3 billion since 2013 because of deaths, pollution, parasites and poor animal welfare.