Our new series 'Scotland's Seas in Danger' is a year-long project looking into the intricate facets of Scotland’s marine environment.
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.
As farming of sea bass and sea bream has grown in Greece and Italy, so have environmental concerns.
Fish farmers in Scotland are permitted to use 16 "toxic" chemicals to kill parasites and fungi, control infections and anaesthetise fish.
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.