Wrasse also have lice. Fish Farming International . Wrasse can help keep salmon clear of lice. Wrasse prove lethal against sea lice. The Scotsman .
More farms use wrasse against salmon lice.
Wrasse halve expenses. Thousands of wrasse now remove lice from caged salmon. Wrasse don't slack in the winter. International Council for the Exploration of the Sea, Mariculture Committee. Canadian Technical Report of Fisheries and Aquatic Sciences .