The largest islands are deeply indented by arms of the sea such as Loch Ròg, Loch Seaforth and Loch nam Madadh. There are also more than 7,500 freshwater lochs in the Outer Hebrides, about 24% of the total for the whole of Scotland. North and South Uist and Lewis, in particular, have landscapes with a high percentage of fresh water and a maze and complexity of loch shapes. Harris has fewer large bodies of water but has innumerable small lochans. Loch Langavat on Lewis is long, and has several large islands in its midst, including Eilean Mòr. Although Loch Suaineabhal has only 25% of Loch Langavat's surface area, it has a mean depth of and is the most voluminous on the island. Of Loch Sgadabhagh on North Uist it has been said that "there is probably no other loch in Britain which approaches Loch Scadavay in irregularity and complexity of outline." Loch Bì is South Uist's largest loch and at long it all but cuts the island in two.