Our campaigns Campaign reports Cleaner fish welfare on Scotland’s salmon farms - 2018 Cleaner fish (lumpsuckers and wrasse species) are used by the salmon farming industry in Scotland to eat sea lice from salmon, as an alternative to chemical and mechanical treatments for sea lice. This is a review of the animal welfare concerns associated with the use of cleaner fish on Scottish salmon farms, and recommendations to better protect their welfare. Download Manage Cookie Preferences