Scottish Government research into pesticides used to control the lice that infest farmed salmon deliberately excluded impacts on the “wider marine environment”.
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.
Fish farming companies are being allowed to breach environmental limits and pollute lochs because of export problems caused by Brexit.
Pollution of Scotland’s lochs from a toxic fish farm pesticide has leapt 72 per cent in a year, according to the Scottish Environment Protection Agency
An investigation has been launched into conditions at an Argyll fish farm after footage emerged of dead and dying salmon floating in cages on a freshwater loch.
Campaigners are contemplating legal action alleging animal cruelty after a video showed farmed salmon being deloused by a floating washing machine.
The amount of salmon killed by diseases and other problems at fish farms has reached record levels, with death rates quadrupling over the last 18 years.