Under the plans, fish farm operators in these zones would have to keep sea lice numbers to low levels and face additional monitoring to help safeguard migrating smolts from the lice. About 120 potential zones have been identified in those areas of the west coast through which wild salmon migrate. The majority of existing fish farms will sit within the zones but SEPA has identified eight areas – containing 21 fish farms – in which to concentrate its efforts, including Loch Fyne, Loch Linnhe and Loch Carron.