The Scottish salmon farming industry has incurred “hidden” costs of £3.3 billion since 2013 because of deaths, pollution, parasites and poor animal welfare.
Police have apologised to an anti-fish-farming campaigner after he complained of being wrongly warned off filming salmon cages in lochs.
Campaigners are contemplating legal action alleging animal cruelty after a video showed farmed salmon being deloused by a floating washing machine.
The Scottish Government defied concerted pleas by salmon farming multinationals to keep photos of diseased and damaged fish secret, according to internal emails.
An environmental campaigner has accused Police Scotland of acting as "private security" for a Norwegian-owned fish farming company.
At least nine million fish have been killed by diseases, botched treatments, poor handling and other problems at salmon farms around Scotland since 2016.
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.
Government officials raised concerns over the import to Scotland of salmon eggs from a Norwegian company called AquaGen after the outbreak of a deadly virus.
The Scottish Society for the Prevention of Cruelty to Animals is facing criticism after it decided not to punish a fish farming company caught on film with lice-infested salmon.