Fyne, Loch (lŏkh fĪn) [key], arm of the Firth of Clyde, Argyll and Bute, W Scotland. It extends 40 mi (64 km) N and NE from the Sound of Bute. The loch has long been famous for its herring fisheries. The Crinan Canal (9 mi/14.5 km long) connects Loch Fyne with the Sound of Jura.
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