Moray Firth the Moray Firth and Highland, Moray and Aberdeenshire to the south. The firth has more than 800 kilometres (about 500 miles) of coastline, much of which is cliff. A number of rivers flow into the Moray Firth, including the River Ness, the River Findhorn and the River Spey. Various smaller firths and bays are inlets of the firth, including the Cromarty Firth and the Dornoch Firth. The Pentland Firth has its eastern mouth at the Moray Firth's northern boundary. The Moray Firth is effectively two firths, the Inner Moray Firth , which was traditionally known as the Firth of Inverness,
Firth of Tay Firth of Tay The Firth of Tay (Scottish Gaelic: Linne Tatha) is a firth in Scotland between the council areas of Fife, Perth and Kinross, the City of Dundee and Angus, into which Scotland's largest river in terms of flow, the River Tay empties. The firth has a maximum width of at Invergowrie. Two bridges span the firth, the Tay Road Bridge and the Tay Rail Bridge. The firth has one major island, the marshy Mugdrum Island. The Firth of Tay in Antarctica was discovered in 1892-93 by Captain Thomas Robertson of the Dundee whaling expedition and named by him