Millions of salmon eggs have come to Scottish salmon farms from Norway, but the imports have now been banned over virus fears.
The number of annual inspections of sites regulated by the Scottish Environment Protection Agency fell by a quarter over the last five years, prompting concerns about pollution.
Energy, fishing and other industries that profit from the sea would have to pay to help save marine wildlife under a scheme being put forward by environmentalists.
Government investigations of alleged animal cruelty after lice-infested salmon were filmed at a fish farm on the island of Lewis have been branded a “whitewash”.
Nearly 200 fish farms are allowed to use a carcinogenic chemical called formaldehyde which is used to embalm corpses.
The multinational salmon farming industry has been pushing behind the scenes for environmental limits on a toxic pesticide to be 100 times weaker than government regulators recommend.
The oceans are being “plundered” for fish to feed farmed salmon in Scotland and around the world, according to a new report.
At least nine million fish have been killed by diseases, botched treatments, poor handling and other problems at salmon farms around Scotland since 2016.
A leading Scottish salmon farming company has stopped branding its business as “sustainable”, according to the UK advertising watchdog.