Wrasse help remove lice from salmon, enabling farmers to use fewer pesticides What’s good for farmed salmon may not be for natural ecosystems. Small fish called wrasse painlessly peck sea lice ...

Sark is set to become the first place in the British Isles to ban the export of live wrasse. The colourful fish has rocketed in value since being used to clean parasites off farmed salmon in Scotland.

BBC Scotland understands that about three million wrasse are needed to support the 60 million salmon produced in Scotland, but only about 600,000 come from farms. The rest are caught in creels and ...