Nearly half of Scotland's salmon farms burn, dump or destroy millions of dead fish every year.
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.
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
A salmon farming company has been reprimanded for feeding a toxic pesticide to fish twice as often as permitted and breaching a safety limit.
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.
The rural economy secretary, Fergus Ewing, has been criticised for "an abdication of responsibility" and as "very un-ministerial" by a civil service trade union.
The rural economy secretary, Fergus Ewing, has been accused of breaching the ministerial code by failing to record 25 meetings with the fish farming industry.